This app is definitely have a good quality, fun for kids and the game doesn't glitch or laggy. The only bad thing in this game is it doesn't available for United State store. This game very creative so I think it best for kids want to play or some person want to figure something out. For the game, we doesnt have to pay for it and I think that pretty much what every body want. I hope in future this game have more and more updates for unlimited creative for kids and it would be the best if it available in United State.