I actually thought this was a great activity for toddlers. You basically give them a colander, turn it upside down and let them stick pipe cleaners into all of the holes. I really liked this when I saw it so when my 2 yr old grandson came over I set him up with this. The problem was that either the pipe cleaners were too thin or the holes were too big and it didn’t really work . http://tinkerlab.com/2011/03/colander-sculpture/