It's suggested that you take your kid to the dentist once between 1-2 years.
However, they can't really do real teeth cleaning on your kid yet. They'd
just check how clean (or dirty) the kid's teeth are. They may also give you
suggestions about how to fight a wiggling toddler to give him/her quality
tooth brushing. So the visit is helpful. I don't know whether it's worth $24
/month.