Tools of dentists
This woman's dentist is a true fanatic when it comes to oral hygiene. That dentist built a sink shaped like teeth.
You would imagine how her dentist cleans the sink. Your baby can pull a meter-long string, insert it between each tooth, and slide it up and down. He can then squeeze a pea-sized amount of liquid soap, rub it all over the sink, and gently brush until all the residue is removed.