With the HABA Brain Builder Peg Set, little ones will activate their brain to solve the different peg patterns. Game includes three different levels of difficulty from the easiest at 1 star to the hardest with 3 stars. One side of the card shows the end result structure, the other side shows the 'answer' of how to build that structure. Kids (and parents) of all ages can step up to the challenge or design their own! For ages 2 and up.