I use children's toothbrushes to reach my back teeth, plus they are far more fun to look at than "grown-up" brushes. The Tigger version has problems: sometimes it runs erratically, sometimes it runs fine, and sometimes it doesn't run at all. Now I shake it before I try to start it, and that usually works. I could return it, but one can use an electric toothbrush in the manual mode, so I decided a return was too much trouble. I have the Winnie the Pooh from the same product line, and I have had no trouble with it.