I make bird toys (for my own parrots as well as selling them online) and am trying to see what all I have already can be used for toys for the rats. Here is my list so far; please correct me anywhere I need it! So far I think I know the following are safe: Hardwood beads Loofah Vine Apple Cardboard Paper Popsicle Sticks Seagrass Cork Coconut shell Cottonwood Cotton Rope Fleece Acrylic (Hard Plastic) Cholla Stainless Steel Vegetable Tanned Leather Yucca Bamboo Palm Willow And unsafe are: Pine (fresh) Soft Plastics Rubber Small Plastic beads (pony, etc) What I am unclear on are: Balsa Pine (kiln dried) (I've heard it's okay if they can't pee on it?? I know that most bird toys in the pet aisle are usually pine and those are supposed to be fine) Pinecones Mahogany Fruit Pod slices Anything else I am missing, or any corrections to this list? I know birds are really sensitive and there is a lot of overlap but not everything overlaps! I just want to be 100% sure before I add anything to the cage. Thanks in advance!