When you order the Explorer Kit or the Creative Set/Monster Game, you are able to unlock extra digital content.
The extra digital content is 18 additional levels (Roll levels) in Newton and extra galleries for Masterpiece.
The extra content is unlocked via the Creative Board. Placing the Creative Board and playing with it will trigger the additional game levels in Masterpiece and Newton. If you do not have the Creative Board, but purchase it later on, this is how you will unlock the additional levels.