My six week-old chicks went bonkers this afternoon for corn-on-the-cob, the soft kind sold in stores for humans to boil up and eat. I just stripped the leaves and silk off and let them have at it. Peckathon!!!! Lots of fun and entertainment for them as they peck at the cob for a long time getting every little shred of kernel off. I love a lot of the other ideas on here as well. My chicks are outside in a pen during the day on the ground, they're getting plenty of natural grit, grass and tiny bugs, but its fun to socialize them with treats!