Fall leaves, autumn leaves. Quick and easy. I gave each child a sheet of red, orange, yellow, brown, or green construction paper (this sheet is standard 9x12, but it looks larger because her arms and hands are so tiny.) With a crayon, they traced their hands, then cut them out on the outline. I hung the "leaves" in the room, and whenever the AC kicks on, they "flutter" nicely.
This activity also gave me the chance to check and grade their cutting skills. This early in the year, their use of scissors is very crude, but it does get better with practice.