Here's what you need:
Put some green paint on a paper plate and mix with a few drops of dishsoap.
Cut out a "trunk" from brown paper and glue it to the paper. Place the paper in front of the child with the "top" of the tree closest to them. Dip hands in paint, and let them go crazy!
Idea: Fold the paper to make a card. Make a mini tree on the front and write "Happy Spring." Have your child "sign" the inside and send to someone special for your To You Tuesday.