My DD fell over a lot at that age too. I ended up going to the doctor just to have her checked out and it turned out she had terrible ear infections and that was causing her bad balance. After treating the initial infection, we went to the ENT who advised a dairy free diet long term, which worked for us. He told us a fairly large percentage of children react to dairy this way and apparently dairy can cause inflammation and swelling in the ENT area. Other wise she would have needed to get grommets.