You will need:
Draw your basic hopscotch grid, then the first player throws a marker, such as a bean bag, into box 1.
The player hops on one foot (or alternating feet) all the to the last box and back, stopping to pick up the marker on the way.
Players take turns trying to throw in each box in order (1, 2, 3, etc.).
A simpler way to play is to follow the instructions above, but only to hop to the first square, pick up the marker, and return.
This game encourages hand/eye coordination and balance.
Why not ask your child to draw out the hopscotch board and to write the numbers, supporting their mathematical graphics.