Ages 9+ Unblock Me is a fun puzzle game that comes in a free or premium version. There are different modes to playing this game and will keep your little ones of all ages entertained.
We compare this game (and the challenge and frustration) to Tetris and if you're adult who enjoys playing app games, you'll know what we mean! There are in-app purchases available as an option. BUT if the WiFi is off, this won't be a problem.