Portable tennis rackets trainer play set for individual and group training This versatile tennis set can help your children improve their tennis skills and reaction speed. It is lightweight, portable, and compact, convenient to carry or store. You can use it almost anywhere, such as home, school, playground, etc. It can help enhance hand-eye coordination and reaction speed. Package includes: 1x Training base you can fill with sand or water to anchor it to the ground. 2x tennis rackets. 3x ball. (Tennis ball attached to training base, badminton ball, blue tennis ball) Specifications: Racket dimensions: 53 x 21 cm. Training base dimensions: 22.5 x 15 cm. Badminton ball dimensions: 9 x 7 cm. Tennis ball dimensions: 5 cm. Don't hesitate to buy this set for your kids and build a mathematical mind for them.