TallyTots makes learning fun for toddlers. Rather than making 
counting a chore, it walks them through the process, then rewards them with fun, interactive activities that reinforce the number. For example, if the number is 7, kids are encouraged to make a sandwich with seven layers. Kids may want to play it again and again — but it’s not perfect. Once an activity is completed, the app waits for you to pick another number, which requires selecting one from the top or bottom of the screen, then pressing it for 3-4 seconds. That’s nothing for adults, but kids may lose interest in having to touch the screen in a single spot for that long. It would be nice to see an option to advance to the next number once the interactive element had been completed (or after a period of inactivity). That’s a quibble, though. For parents looking to teach their toddlers how to count, this is a fine tool.
Chris Morris: Journalist 
We’re just wrapping up an update that adds everything you’ve mentioned. Every activity has a distinct end that brings previous and next tabs on screen. Plus a new song and several other refinements. We’re really anxious to send it to Apple. Hopefully in the next day or two.