Grimm's Stepped Counting Blocks (100pcs) (2cm) (42100)This 100 piece stepped counting block set has a length of 22. 5 cm great for a school aged child. Build and play. Create different things and experience the difference in size. Learn the correct order of the rainbow. The 2 x 2 cm building block family consists of many different small building set all of the same 2 cm thickness. They compliment each other perfectly and can be combined in many different ways. Because of the smaller size of the building