Our TTh 3 y/o created a BIG monster. A large plain piece of a cardboard covered with orange wrapping paper.
We added long, straight purple hair. Our monster has two big eyes (paper plates). The big orange monster has two pink triangle ears. He has a large green nose with a big blue mouth and sharp white teeth.
This would be an easy project at home. It takes no artistic ability. You need cardboard (cereal and cracker boxes would work great), construction paper, scissors and glue. I did cut the shapes for the children and they glued the pieces onto the monster. Older children can get in the fun and trace shapes for younger siblings to cut or create their own monster.