First Palette *LU
This website is full of fun elementary school crafts and printables for every occasion. You can search by seasons, themes, occasions, age, type of craft and more! These could make for some fun first grade centers or any other grade K-5.
Personal Creations *ALL
This website also has tons of free craft printables for all occasions like the adorable heart-shaped animal crafts for Valentine's Day.
Artful Parent *LU
This website/blog has lots of fun elementary school arts and crafts for parents to do with their children at home. She gives lots of great tips on how to incorporate art into your day.