"When I bought this I was so excited so I came home, downloaded the app, and started building! A comment on the app that you have 360 3D view so if you are not sure where a piece goes, you can drag to move it! Lego Mario requires 2 AAA Batteries and it should last you 20-25 hours of playtime! After I was finished building I opened the Expansion Set (Monty the Mole) Which came with the set when I bought it! Now when I play with my sister our course is bigger and BETTER and I'm thinking of getting more expansion sets in the future!"