When I was in grade school, my teacher started us on a fun craft project. We made baby rattles! How do you make a baby rattle? It’s easy! Take a normal incandescent light bulb and paper-mache the entire thing. Then you paint it bright, happy colors. After the paint dries, you smash it against your desk so that the glass inside shatters into a hundreds of tiny glass shards. And that makes it rattle!
Yes, in the early 70’s / late 80’s, it was completely acceptable for your teacher to suggest that you give babies GLASS to play with. Of course, it was completely safe, being wrapped up in PAPER. What could possibly go wrong?