With the money he got from his grand parents, Isaac got himself the Super Mario Maker video game for the Nintendo Wii U along with the 30th Anniversary Mario amiibo.
Basically in the video game, you create and play your own levels. It is limitless since you can use so many different items within your levels. Plus you can upload your level online so others can play and vice versa.
Using the Wii U gamepad makes it easy due to the great UI (user interface) and the stylet. Isaac really loves it!