Collaborate with your youngest on this fail-proof autumnal art activity that combines drawing, stenciling, and stamping.
First, have your child draw a tree trunk with branches on a piece of card stock. On a second piece of card stock, make a stencil for the tree's leafy crown by drawing and cutting out a cloud shape. Lay the stencil on top of the tree's branches, taping it in place with painter's tape, if desired.

Snip and tear a kitchen sponge into roughly one-inch-wide pieces. Pour a few small puddles of tempera paint onto a plastic plate, and place a piece of sponge on each puddle. Have your child use the sponge pieces to stamp fall foliage onto the branches.