The idea of the game is to help this modern stone-age family make it through what Rovio calls pre-hysterical times as you gather food while capturing strange creatures and taming them. Sound a bit like Pokemon? Rovio even asks, "Think you can catch them all?" And one of the family members, Grug (pronounced Grug) tries to invent things. Let's hope the pre-historic version of Apple isn't going to claim a patent for the wheel.
The Croods move from landscape through landscape and there are ten creatures to catch. Besides Grug's inventions, you can decorate the Croods world with the latest caveman accessories. There is a warning about the game from Rovio. While it is a free download for iOS and Android, there are in-app purchases that you can make using real money. If you don't want your kid spending a multiple of your net worth on the game, disable in-app purchases on your phone or tablet.
source: TheCroods via TechCrunch