CraftyDucks

Crafty Ducks is a traditional tile-matching game based upon the duck characters from the popular Farmer Pete songs by the Number Fun company. In the app, the "crafty" ducks from the songs have set up cunning math puzzles in which the player has to find matching tiles that create number bonds to 20. (For example, an 18 and a 2, or a 15 and a 5.) The player has a countdown timer to find all of the matching pairs within the time limit of, and a score keeps track of how many pairs they've matched.

This game was followed-up by a sequel based on the Farmer Pete property, an app simply called Farmer Pete.