These marble sets are so much fun, not just for the kids but for the whole family! Head over to Amazon and pick up this Marble Galaxy Fun Run Set for only $24.49! (Reg $51.90) This set includes 20 glass marbles and 70 building blocks that you can assemble in 4 different ways! In this way, your child can learn how to build many different tracks with the different accessories. The marble galaxy pieces are all translucent, so the racing marbles are all visible!