This fraction building set is a great supplement to any fraction lesson. It allows the learner to see the fraction sets visually as well as offer stimulation and addition through using it as a manipulative. this learning set includes 12 sets of fractions to intermix, from whole (1) to 12. It also includes a base board, to see what the color and shape of each sized piece. It has an inset circle so that you can mix and match to find pieces of a whole. This set is great in a Montessori classroom, and can be mixed into any curriculum using fractions. It is made from poplar wood. This set contains small parts and is not intended for children under 3.