Using beach balls is a great way to make tennis easy and fun for very young children, and also beginner juniors and even adults. Have a look at the video below where you can see children aged 4 & 5 actually playing a proper game of tennis with a beach ball, which they couldn’t do with small balls. I sometimes have children as young as 3 doing bounce-ups with beach balls.
Note: beach balls won’t work in wind. If outdoors you may be better with bouncy balls like I talk about HERE