Nienhuis has based its success on manufacturing high quality Montessori materials, innovative product development and superb customer service. We don’t stop there… We feel it is also our responsibility to keep your classroom in the best possible condition. We carry an extensive selection of Spareparts for most Nienhuis materials. We have over 1500 items in stock, including: beads, laser-cut puzzle pieces, cubes, knobs, and just about anything else you would need to keep your classroom complete.