Start baby proofing! These are the 17 worst hazards in the home for kids

Those small, flat, shiny batteries can be found in many items around the house, including children’s toys, musical greeting cards and remote controls. Dozens of Canadian kids end up in emergency rooms every year after accidentally swallowing them. Once ingested, the batteries can cause choking, serious chemical burns and poisoning.

TIP: Reynolds says children should never be left alone with anything that contains a button battery, including toys. When not in use, store these items out of reach. “Parents often think to tape down [battery],” she says. “But the tape will often dry on the edges and curl. That’s where little people like to pick.”