What Do You Need to Play Wallball
A wall. A ball. Easy!
Ideally, your wall should be nice and flat and you can mark out your court with chalk, paint, or tape. Alternatively, you can find a community wall and start playing on a full size court right away.
The official balls are great fun. They’re bouncy and make a great sound when you hit it just right. If you don’t have an official Wallball, you can always use a tennis ball.
You can get the official One Wall Ball from Decathlon.
If you’re on the full size court then you can get them here and here.
If you’re starting out, a young player, or playing on a small court, then you might want to use some slower softer balls. You can these alternatives here and here.