You buy thisGross motor1½–4 yrsHome or out
A decent ball
The cheapest toy that grows with him for years.

A decent ballView on Amazon
Prep
0 min
Mess
None
How to play
Roll it back and forth sitting down first. Then kick it, throw it, bounce it, aim it at a target. Change the game as he gets better.
What you need
One soft, light ball — bigger than his head is a good size to start.
What it secretly builds
Gross motorCatching means predicting where something will be, not where it is. That prediction is one of the hardest things a young brain learns to do.