Consider paying to have your child's teeth painted with fissure sealants. This plastic coating seals up the tiny cracks in teeth where cavities begin. Get a gum-shield fitted if your child does contact sports. Almost every child has some little friendly creatures lurking on them every now and then, and I don't mean the family moggie. Headlice are at epidemic levels so make a weekly appointment with a fine comb to keep a look out for them.
Worms are also common.
Keep a watch for symptoms, particularly an itchy bottom at night. Scabies can happen to the cleanest child - check in the webs between the fingers and toes for red winding burrows and rash. As many as 1 in 5 children will have a significant problem with their mental health at some point. Make sure your child has plenty opportunities to talk about their problems, with at least one 15 minute period a day when you sit down with them, talk and listen. If you have serious worries about your child's mental well being, talk to your doctor.