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 Lot of 144 NEW Stiga Ping Pong Balls Table Tennis 1 One Star Training Practice $12.50 (6 Bids) Time Remaining: 2h 34m |
 30 pcs Double Happiness DHS 3 STAR TABLE TENNIS BALL $13.99 Time Remaining: 10d 14h 34m Buy It Now for only: $13.99 |
 50 pcs Double Happiness DHS 3 STAR TABLE TENNIS BALL $19.99 Time Remaining: 3d 12h 36m Buy It Now for only: $19.99 |
 HALEX VELOCITY 1 STAR 40MM PING PONG TABLE TENNIS BALLS $4.00 Time Remaining: 1d 5h 40m |
 30 x 3 Star 40mm Olympic Table Tennis Balls Ping pong $8.50 Time Remaining: 2d 8h 49m Buy It Now for only: $8.50 |
 12Pcs Table Tennis Ping Pong Balls DOUBLE FISH Orange $3.99 Time Remaining: 1d 9h 15m |
 36 Gambler Table Tennis Ping Pong Balls 40mm Orange $11.99 Time Remaining: 1d 17h 32m Buy It Now for only: $11.99 |
 24Pcs Table Tennis Ping Pong Ball DOUBLE FISH New White $6.99 Time Remaining: 1d 10h 16m |
 100 pcs Double Happiness DHS 3 STAR TABLE TENNIS BALL $33.99 Time Remaining: 19d 1h 57m Buy It Now for only: $33.99 |
 24 Pcs Table Tennis Ping Pong Balls DOUBLE FISH Orange $6.99 Time Remaining: 1d 12h 18m |
 144 Ping Pong Balls Beer Pong Table Tennis Quick Ship $18.99 Time Remaining: 18d 6h 59m Buy It Now for only: $18.99 |
 Double Fish Orange 3 x Balls ITTF Approved 3 Star 40mm Table Tennis Brand New $0.99 (1 Bid) Time Remaining: 1d 14h 39m |
 60 x XIZHONGXI 3 Star 40mm Olympic Table Tennis Balls $9.00 Time Remaining: 19d 8h 16m Buy It Now for only: $9.00 |
 KILLERSPIN 3 BOXES OF 6 TRAINING TABLE TENNIS BALLS NIB FREE SHIPPING MUST SEE $18.99 Time Remaining: 2d 4h 55m |
 144 Ping Pong Table Tennis Balls White 1 Gross 12 Dozen $20.97 Time Remaining: 9h 49m Buy It Now for only: $20.97 |
 8 Table Tennis Ping Pong Balls $0.95 Time Remaining: 2d 15h 49m Buy It Now for only: $9.75 |
 Brand New 20 x 3 Star 40mm Olympic Table Tennis Balls Ping pong balls Orange $6.50 Time Remaining: 2d 1h Buy It Now for only: $6.50 |
 Ninja Lot of 36 X 40mm White Table Tennis Ping Pong Ball Training Brand New $13.99 Time Remaining: 3d 4h 53m Buy It Now for only: $15.49 |
 40MM 12 SEAMLESS ORANGE PING PONG TABLE TENNIS BALLS USATT GOLD CLOSE TO $5.00 Time Remaining: 12d 42m Buy It Now for only: $5.00 |
 12 pcs Table Tennis Balls White Ping Pong Balls 40mm New $0.01 (1 Bid) Time Remaining: 3d 7h 41m |
 10 x Good Useful Xi Shang Xi Nice Big 40mm 3 Stars Best Table Tennis Balls $3.99 Time Remaining: 4d 23h 53m Buy It Now for only: $3.99 |
 60pcs DHS 40MM 3 Star Table Tennis Ping Pong Balls Orange $28.85 Time Remaining: 3d 8h 58m |
 PING PONG BALLS TABLE TENNIS BALLS 144 pk 2 3 Day quick FAST SHIP $19.95 Time Remaining: 21d 11h 5m Buy It Now for only: $19.95 |
 6pcs DHS 40MM 3 Star Table Tennis Ping Pong Balls Orange $0.99 Time Remaining: 3d 9h |
 6 Butterfly 3 star ITTF Ping Pong Balls Table Tennis Wh $9.99 Time Remaining: 11d 8h 50m Buy It Now for only: $9.99 |
 Sportcraft Table Tennis Ping Pong Balls 40mm Balls 6pack 3 Star 2 Orange 4 White $6.99 Time Remaining: 3d 11h 46m |
 Sportcraft Anywhere Table Tennis Ping Pong Set Expandable Travel + Paddles Balls $12.95 Time Remaining: 23d 1h 57m Buy It Now for only: $12.95 |
 144 DHS 40mm 3 Star Table Tennis Ping Pong Balls Orange $19.90 Time Remaining: 24d 14h 42m Buy It Now for only: $19.90 |
 6 Butterfly 3 star ITTF Ping Pong Balls Table Tennis Wh $9.99 (1 Bid) Time Remaining: 3d 18h 19m |
 10 Double Happiness 3 STAR TABLE TENNIS BALL DHS 40mm $5.95 Time Remaining: 4d 19h 38m Buy It Now for only: $5.95 |
 Joola Magic 2 Star Table Tennis Orange Ping Pong Balls 48 Pack $14.95 Time Remaining: 3d 23h 22m |
 60 x 3 Star 40mm Olympic Table Tennis Balls Ping pong Balls White $9.00 Time Remaining: 2d 9h 43m Buy It Now for only: $9.00 |
 18 pcs Table Tennis Balls White Ping Pong Balls 40mm New $7.85 Time Remaining: 4d 6h 10m Buy It Now for only: $8.95 |
 12 Butterfly 3 star ITTF Ping Pong Balls Table Tennis O $18.99 Time Remaining: 11d 7h 6m Buy It Now for only: $18.99 |
 6 pcs Table Tennis Balls White Ping Pong Balls 40mm New $4.35 Time Remaining: 4d 6h 13m Buy It Now for only: $4.90 |
 NEW Wet Products Smashball Beach Tennis Set 2 Paddles 1 Ball FREE SHIPPING $13.99 Time Remaining: 22d 3h 33m Buy It Now for only: $13.99 |
 STIGA table tennis balls 36 pack ping pong balls ORANGE WHITE MIXED $9.99 Time Remaining: 5d 9h 2m |
 144 DHS 40mm 3 Star Table Tennis Ping Pong Balls White $19.90 Time Remaining: 22d 11h 45m Buy It Now for only: $19.90 |
 STIGA balls Ping Pong 36 pack table tennis balls MIXED COLORS Orange White Blue $9.99 Time Remaining: 5d 9h 5m |
 10 Pcs White Big 40mm xi shang xi 3 Stars Best Table Tennis Balls Nice $4.00 Time Remaining: 19d 18h 52m Buy It Now for only: $4.00 |
 Butterfly 40mm Table Tennis Ping Pong Training Balls White $4.99 Time Remaining: 6d 1h 41m |
 New 20pcs 3 Star 40mm Olympic Table Tennis Balls Ping pong Balls White $6.50 Time Remaining: 2d 54m Buy It Now for only: $6.50 |
 Killerspin Champion 3 Star Table Tennis Balls 72 pack Ping Pong ITTF Approved $92.72 Time Remaining: 6d 23h 27m Buy It Now for only: $114.00 |
 20 Pcs Big 40mm 3 Stars Best Table Tennis Balls Ping Pong balls Ping pong $6.40 Time Remaining: 26d 18h 21m Buy It Now for only: $6.40 |
 Wet Products Smashball Beach Tennis Set 2 Paddles and 1 Ball $14.94 Time Remaining: 10h 49m |
 30 Pcs White Big 40mm 3 Stars Best Ping Ping Table Tennis Balls Ping Pong $8.60 Time Remaining: 26d 18h 42m Buy It Now for only: $8.60 |
 New Newgy 2050 Ping Pong Robot Table Tennis In Stock Racket Balls Thrower $699.00 Time Remaining: 11h 46m |
 12 Halex Official Size Velocity 1 Star Table Tennis Ping Pong Balls $8.95 Time Remaining: 29d 13h 51m Buy It Now for only: $8.95 |
 Ping Pong set Table Tennis Racket Paddle 3 Plastic Balls Net Indoor game toy kid $18.99 Time Remaining: 1d 1h 36m |
 100 x Big 40mm Olympic 3 Stars Best Table Tennis Balls $24.00 Time Remaining: 13h 25m Buy It Now for only: $24.00 |
 Beginner Level Ping Pong Table Tennis Set incl Paddles Balls Net $7.99 Time Remaining: 1d 3h 33m |
 10X Double Happiness DHS 3 STAR TABLE TENNIS BALLs 40mm $5.99 Time Remaining: 8d 4h 10m Buy It Now for only: $5.99 |
 12 x DHS 3 Star Orange Ping Pong Balls Fit Table Tennis World Class Game $7.78 Time Remaining: 2d 7h 2m Buy It Now for only: $7.78 |
 double fish 6a e Ping Pong Paddle Table Tennis Racket Short Professional 2 balls $9.99 Time Remaining: 1d 8h 31m |
 72 Gambler Table Tennis Ping Pong Balls 40mm Orange $14.99 Time Remaining: 1d 17h 33m Buy It Now for only: $14.99 |
 1 Pair of Table tennis Rackets with 3 balls $5.00 Time Remaining: 1d 8h 33m |
 48 pcs DHS 3 star ITTF Table Tennis white Balls $32.50 Time Remaining: 29d 16h 48m Buy It Now for only: $32.50 |
 double fish 5a e Ping Pong Paddle Table Tennis Racket Short Professional 2 balls $9.99 Time Remaining: 1d 14h 29m |
 100 pcs 3 STAR Olympic Good Nice Quality TABLE TENNIS BALL 40mm $27.00 Time Remaining: 2d 16h 26m Buy It Now for only: $27.00 |
 DHS Ping Pong Paddle Table Tennis Racket 3 Star Short Professional 1 ball $9.99 Time Remaining: 1d 15h 22m |
 12 orange DHS three stars table tennis balls USA Seller with Fast Shipping $15.00 Time Remaining: 12d 14h 14m Buy It Now for only: $15.00 |
 4 Sportcraft table tennis padl pack w post no net 14 balls $14.99 Time Remaining: 2d 8h 24m |
 Joola iPong Pro iPong 2 Table Tennis Ball Machine i2 Training $175.00 Time Remaining: 25d 1h 29m Buy It Now for only: $175.00 |
 double fish 4a c Ping Pong Paddle Table Tennis Racket Long Professional 2 balls $9.99 Time Remaining: 2d 10h 34m |
 18 pcs Double Happiness DHS 3 STAR TABLE TENNIS BALL 40mm $12.99 Time Remaining: 15d 14h 24m Buy It Now for only: $12.99 |
 Wet Products Smashball Beach Tennis Set 2 Paddles and 1 Ball $14.94 Time Remaining: 2d 10h 48m |
 5X Ping Pong Balls Train Table Tennis Sports Games New $1.65 Time Remaining: 29d 16h 56m Buy It Now for only: $1.65 |
 double fish 5a c Ping Pong Paddle Table Tennis Racket Long Professional 2 balls $9.99 Time Remaining: 2d 11h 51m |
 40MM 72 SEAMLESS ORANGE PING PONG TABLE TENNIS BALLS USATT GOLD CLOSE TO $19.50 Time Remaining: 19d 14h 3m Buy It Now for only: $19.50 |
 TABLE TENNIS Wall Clock ping pong paddles ball game $13.49 Time Remaining: 2d 12h 36m Buy It Now for only: $14.99 |
 72 Ping Pong Balls Table Tennis Beer Pong $11.79 Time Remaining: 14h 16m Buy It Now for only: $11.79 |
 double fish 4a e Ping Pong Paddle Table Tennis Racket Short Professional 2 balls $9.99 Time Remaining: 2d 13h 21m |
 10X Ping Pong Balls Train Table Tennis Sports Games New $2.85 Time Remaining: 29d 16h 59m Buy It Now for only: $2.85 |
 2x DHS Table Tennis Rackets Ping Pong PaddleBeginner +3 Ball $0.99 Time Remaining: 2d 14h 35m |
 20 Pcs White Big 40mm Nice 3 Stars Best Table Tennis Balls Ping Pong Ping Pong $6.40 Time Remaining: 26d 18h 46m Buy It Now for only: $6.40 |
 Table Tennis Ping Pong Exercise Sport Ball Net Post Net K0115 3 $21.59 Time Remaining: 2d 16h 47m |
 DHS 3 star 40 mm table tennis Ping Pong Balls Gross Pack 144 Orange $89.99 Time Remaining: 14d 12h 47m Buy It Now for only: $89.99 |
 Double Circle 40mm table tennis Ping Pong Balls Gross Pack 144 Competition $39.99 Time Remaining: 14d 12h 49m Buy It Now for only: $39.99 |
 2x DHS Table Tennis Rackets X1002 + 6x CTTA Balls $22.00 Time Remaining: 2d 23h 8m |
 Butterfly 3 Star Table Tennis Balls 40mm x 6pcs $10.80 Time Remaining: 4d 11h 15m Buy It Now for only: $10.80 |
 double fish 3a c Ping Pong Paddle Table Tennis Racket Long Professional 2 balls $9.98 Time Remaining: 3d 9h 5m |
 Wet Products Smashball Beach Tennis Set 2 Paddles 1 Ball game wooden co $14.94 Time Remaining: 2d 13h 44m Buy It Now for only: $14.94 |
 ANTIQUE VINTAGE Rep indoor TABLE TENNIS SET net paddles balls bag ping pong game $14.99 Time Remaining: 3d 10h 46m |
 24 pcs DHS 3 star Table Tennis Balls $20.00 Time Remaining: 5d 15h 18m Buy It Now for only: $20.00 |
 double fish 6a c Ping Pong Paddle Table Tennis Racket Long Professional 2 balls $9.99 Time Remaining: 3d 11h 24m |
 Tibhar 3 Star Table Tennis Balls 40mm x 9pcs $14.00 Time Remaining: 2d 1h 7m Buy It Now for only: $14.00 |
 DHS Ping Pong Paddle Table Tennis Racket 3 Star Long handle Professional 1 ball $9.98 Time Remaining: 3d 11h 40m |
 72 Gambler Table Tennis Ping Pong Balls 40mm White $14.99 Time Remaining: 1d 17h 33m Buy It Now for only: $14.99 |
 double fish 3a e Ping Pong Paddle Table Tennis Racket Short Professional 2 balls $9.99 Time Remaining: 3d 13h 27m |
 Brewski Brothers Beer Pong Balls 144 Count Lot Ping Pong Table Tennis Game Fun $19.99 Time Remaining: 22d 1h 56m Buy It Now for only: $19.99 |
 30Pcs Big 40mm 3 Stars Best Ping pong Table Tennis Balls Ping pong Useful $0.80 Time Remaining: 4d 1h 38m |
 10 Ping Pong Balls Train Table Tennis Sports Games New $2.85 Time Remaining: 20d 12h 19m Buy It Now for only: $2.85 |
 6 PING PONG BALLS STIGA 3 Star 40mm Balls Orange White Table Tennis Balls $7.88 Time Remaining: 4d 5h 37m |
 6 bright color table tennis balls ping pong neon hot pink easy to see hi vis $3.39 Time Remaining: 18d 5h 47m Buy It Now for only: $3.39 |
 2x Yasaka New ERA Table Tennis Rubbers Sponge Pips infor 40mm ball45 47degree $9.99 Time Remaining: 5d 2h 1m |
 6 x Balls ITTF Approved 3 Star 40mm Table Tennis Double Fish White or Orange $7.90 Time Remaining: 27d 19h 21m Buy It Now for only: $7.90 |
 Table Tennis PING PONG Set Rackets Balls Set with table adaptors net mesh $9.99 Time Remaining: 6d 17m |
 30 DHS ITTF 3Star Table Tennis Balls Olympic Game $32.99 Time Remaining: 26d 19h 26m Buy It Now for only: $32.99 |
 ANTIQUE VINTAGE Rep indoor TABLE TENNIS SET net paddles balls bag ping pong game $14.99 Time Remaining: 6d 10h 56m |
 Crest Table Tennis Balls 6 pack $1.99 Time Remaining: 6d 9h 9m Buy It Now for only: $1.99 |
How to build a tennis ball launcher?
I need to build a launcher that can launch a tennis ball 10m for a school project. It can use only elastic solids as a source of energy to launch it. Any websites for help would be appreciated and preferably a lower price would help.
Note: It has to be consistent and I cannot hold it.
A sling shot using surgical rubber hose as the elastic would be easy to design and build.
Jamie Foxx and his tennisball