TONS of caterpillar / butterfly ideas here - art, science, etc. This paper plate butterfly craft is super cute.
Bright and fun paper popsicle craft for kids. All you need to make this easy kids craft is some construction paper, craft sticks, scissors, and glue sticks.
Have you tried melted crayon rocks with your kids yet? Melted crayon shells works the same way but makes an awesome beach trip art project!