Probability Resource Kit, includes: 4 different types of spinners, 4 different types of dices, two-sided probability discs, assorted discs, and sticks for many probability activities in mathematics
Fraction Resouce Kit, Includes: fraction circle set, fraction square set, overhead fraction circle set, fraction bar set with work book and guide, fraction chart, a Focus on Fraction book and a Fraction Circles activity book
Replacement Sand, set is a refill of the sand included with the Tectonics model. Set includes one pound each of beige, black, blue, orange and yellow sand