Getting young children to brush their teeth twice a day can be a huge challnge, but with its very first mobile app developed in-house, the Ad Council has devised a game that encourages them to do it for fun. Toothsavers lets kids clean the teeth of 10 cute animated characters with swipes and taps on a tablet or iPhone. They can unlock new characters in return for brushing twice a day, and there's an interactive map to chart each day and night's efforts. Parents can use it to designate daily brushing times and monitor kids' brushing progress on a calendar. The app is downloadable for iOS and Android.