This is a great way to introduce mathematical concepts through play. Children can use their problem-solving skills to complete the puzzles. When they are ready and are showing interest, you can begin to discuss the concepts of fractions and talk about how many pieces make up a whole, half and quarters, for example. A great puzzle that can be used in the early years and reintroduced when children are ready to learn about mathematical concepts. This set contains fractions from 1 whole to 1/10. Made of beech. The wooden storage tray measures 18cm in diameter and the formed puzzles measure 15cm in diameter.