what about crayon rolls?
http://thepleatedpoppy.com/2010/05/c...roll-tutorial/
I also agree with the superhero cape.
you could also do an ISpy bag:
http://rosie-baby-crafty.blogspot.co...-spy-bags.html they're great with buttons inside for the "spy" part.
Or, you can do BEAN BAGS with dried beans in about a 4" square of fabric in different colors.. they could play ISpy with that too.