Egg cartons make great seed trays for your spring planting. Plant directly in the garden!
Egg Carton Flower Crafts, this is paper mache' but she says you can make them from egg cartons plus she has a bunch of other great egg carton crafts on her site.
Recycled crafts: How to reuse egg cartons and make a beautiful DIY lamp...seriously, Brandi....egg cartons! ;)
Don't throw those empty egg cartons away just yet! They make for great Egg Carton Bugs. Try this cool activity with the little ones with something every parent has!
make boats with egg cartons and envelopes. Sail them down a tinfoil river!
Around halloween or for your kids to make a craft with friends, make a Monster out of a tissue box and the bottom of egg cartons!