An all time favorite for the wee ones, rubber ducks are everywhere. I create a Holiday ornament with a 2" duck and some ribbon that's perfect for the under 5 set. There are no breakable parts and it's too big to be a choking hazard. It's just right for little ones to hang on the tree. It's on Art Fire.
http://www.artfire.com/ext/shop/product_view/4067546
