Writing with Carrots? Why Not? dip it in veggie dip onto black papper. Or a banana (dipped in pudding? (I haven't figured out how to use A's fav: Seaweed . Large letters though. lots of space for these fun ideas!
Make your own Supertato - the super hero potato from Sue Hendra's brilliant book. Your little one an save the vegetables against the Evil Pea and put him back in the freezer where he belongs. Great for book inspired imaginative play.