Start by tracing your little one's forearm and hand on the brown construction paper. This will be your tree trunk and branches. (Caution: it tickles!) Cut it out, or let them try if they're old enough for scissors.
Cut the green paper into a cloud-shaped blob for the tree leaves.
Glue the green cutout to the blue paper (sky), and then glue the brown cutout on top, so the hand looks like branches and the forearm looks like a trunk.
Place a dime-sized glop of glue on each pom-pom, and let your toddler stick them down on the leaves. Yes, they will get sticky, and yes the sensory experience will be good for them!
Wash your toddler's grubby hands. (Actually, let's not kid ourselves: you'll probably also be washing their whole body!)
Once the pom-poms dry, let them color onto the scene if they wish! (Birds, grass, planes, their family, etc.)