Let them run free.
Walk aimlessly. Get messy.
Let them stare into space; Look at nothing in particular.
Do something random, jump into puddles
Sit on a tree, break a fallen branch
Throw some lotions and cook up a magic potion
Let them follow a fly; try and catch a resting bird.
Jump from the swing, the chair, the bed
Land in some sand or a hard floor that'll hurt
Collect some stones and shiny beads; Bring home random things that in your head are absolute crap.
Let them smell the books, draw some lines; On the paper, the floor, yup even on the wall
Let them run free, Walk pointlessly
Let them be.