Has anyone used a kids Fitbit or other device for the purpose of tracking sleep for a younger child? If so, do you have any device recommendations?

My son is almost 5 and having some major sleep issues. We are working with a sleep medicine physician and also a child psychologist (underlying psych issues possibly contributing). The psychologist mentioned trying to have him wear a Fitbit at night to just get an idea of the quality of his sleep (we think he may be waking more during the night than we know about).

If your child has used one, do you feel like the data is accurate? Would it even work on a child so young? Looks like most of them are for older kids. I'm NOT planning to use it for activity tracking - just sleep tracking.