NIB Plantoys fraction blocks. The PlanToys Fraction Blocks set consists of 20 wooden blocks and a hollow block for kids to explore shape recognition, foundational math skills, sorting and counting, and construction play. Compatible with other block sets in the Unit Plus series. Fractions help children understand the nature of numbers and their interactions. The PlanToys Fraction Blocks help them see these interactions visually Great teaching aid when learning about fractions, addition and subtraction. This set is part of the Unit Plus series and can be used on its own or in combination with any other Unit Plus series set. Sustainably made in Thailand with chemical-free rubberwood trees, formaldehyde-free glues, organic pigments, and water based dyes. Tags: Montessori, lovevery, guidecraft, lakeshore learning, learning resources, Melissa Doug, Hape, haba, plantoys, Janod