i'm recycling little onesies and writing on them- I LOVE MY MOTHER-and then drawing a picture of planet earth.
i use those fabric crayons-they come out cute.
also do 'organically grown' and draw peas and carrots.
one year i bought a bunch of white washcloths and wrote on them with fabric crayons-you can make a difference- and attached them to a stick for the kids to wave as flags.
preggo moms got one for free!
we also have some trees to plant and clean up opportunities.