This Wooden Addition Board is one of the essential resources for actively learning children. The puzzle pieces are self-correcting and help children understand the basics of Counting, Addition and Subtraction. This board is made from high quality child-grade wood and non-toxic materials. A great resource for parents of toddlers, lesson teachers, tutors, etc. Play-based learning is a core component of the Montessori style of learning which is more effective today. The child is guided on how to use these resources and allowed to build creativity and intellect. This Wooden Addition Board is one of the essential resources for actively learning children. The puzzle pieces are self-correcting and help children understand the basics of Counting, Addition and Subtraction. This board is made from high quality child-grade wood and non-toxic materials. A great resource for parents of toddlers, lesson teachers, tutors, etc. Play-based learning is a core component of the Montessori style of learning which is more effective today. The child is guided on how to use these resources and allowed to build creativity and intellect.