J.C.
Hello B.. I have delt with this before. My son, who is now 10 had this problem back when he was 3-4. It is horrible for them. I use this stuff called CalMag. I know it sounds funny but it is the best stuff in the world. It is calcium and magnesium. That is all that's in it. It is a powder form and you mix it in with hot water and then cool it down and drink. It does not taste good and it takes some getting use to but my son drinks in now every other day with no problem. I started him out with a little and gave him a treat when he was done and he has gotten use to it now. Calmag has many wonderful denifits. It is really good for there bones and muscles. A lot of the time what happens is, we give our kids so much calcium that they don't get enough magnesium so it doesn't do what it needs to do. In order for the calcium to work right, it has to have the magnesium to go with it. I hope that makes sence to you. There is a websit you could visit if you are interested. It is www.VitaminsThatWork.com or you can call them at 1-800-446-7462 and request information on Calmag. This stuff really does work. Good luck with it.
J.