It might be hard to see in the photo, but we cut up egg cartons and used the little cups for flowers. A hole was punched in the middle for the "stem" - pipe cleaners - and I traced leaves onto green construction paper and cut them out - these went onto the pipe cleaner. The kiddos used crayons and markers to color the cups. Once we get enough made, we will put them in a vase for display.
This idea came from Craftbits.com - http://www.craftbits.com/project/egg-carton-flowers
This held their attention for approximately 10 minutes....It was fun for me though!