Sometimes, I have to answer complex questions, and this happens to be one of those times. Unless specified as die-cast, tin, wood, or other materials, many toys are made of plastic. Toy brands do, however, consider the safety concerns with BPA, phthalates, and lead. If a toy doesn't show consideration for these problems in plastic on the packaging, reconsider your options. You'll see many of the toy brands outright tell you their products are BPA, phthalate, and lead-free. You want your children to safely be able to bite and drool all over their toys.