You have to find the hidden letters.
Alvin is recording a new song and he needs your help to play his part.
Play the harmonica using the right notes with Alvin in this game.
About The Croods
The Croods is a 2013 American 3D computer-animated adventure comedy film produced by DreamWorks Animation and distributed by 20th Century Fox. It features the voices of Nicolas Cage, Emma Stone, Ryan Reynolds, Catherine Keener, Clark Duke, and Cloris Leachman. The film is set in a fictional prehistoric Pliocene era known as "The Croodaceous" (a prehistoric period which contains fictional prehistoric creatures) when a caveman's position as a "Leader of the Hunt" is threatened by the arrival of a prehistoric genius who comes up with revolutionary new inventions as they trek through a dangerous but exotic land in search of a new home.