Crayon Art - Easy Crafts going to do this for daxtons room! it would be so cute with his name or something.
DIY Clothespin Butterfly These would look really great in her room
printable 'life cycle of a butterfly' activity. glue different kinds of pasta for each cycle. Add grafting chart for each cycle
Use Your Noodle! Quick (and cheap!) spring butterfly decor from @How Does She
Easy paper crafts for kids
Butterflies class art project. Could do something similar, with a different shape, relating to their curriculum.
Print coloring page and book, Heartbutterfly Valentines Coloring Pages for kids of all ages. Updated on Wednesday, April 10th, 2013.
How To Make Butterfly Footprint Art (would like to do this with a large canvas so I can fit all the kids on one, and instead of initials add their names down their butterfly's body)
Butterfly template - could use with folded paper printmaking
Pregnancy reveal --- do with just parents feet and baby booties and maybe write on a sign "Coming _____ "