Are foam mats like these (Amazon.com: POCO DIVO Floor Mat 9-tile Multi-Color Exercise Mat Solid Foam EVA Playmat Kids Safety: Toys & Games), the kind you use for babies, safe for birds? I was looking to use them to make play areas on the floor as well as areas for treats on the bottom of his cage. Is there any kind, in particular, I need to get or look out for? Could I just walk into my local store, go to the baby area, and pluck a random pack off the shelves? Chirp isn't a big chewer, so I'm not too concerned about that.