The Wyatt Number Stacking Blocks truly provide a comprehensive learning experience for children. Not only do they assist with number recognition and counting skills, but they also introduce basic addition and subtraction concepts in a fun and interactive way. The fact that the blocks fit in the tray when in the correct order adds an extra level of engagement and ensures that children are actively involved in organizing and arranging the numbers. This promotes problem-solving skills and logical thinking. Beyond counting, when two blocks are stacked, they equal the number of the same height. This hands-on approach to addition and subtraction allows children to visualize and understand mathematical operations at an early stage. The food-grade silicone material used to make these blocks is not only safe for children but also dishwasher safe, making it easy to clean and maintain. Most importantly, the Calla & Friends Wyatt Number Stacking Blocks are designed to grow with your child as they learn and develop. From basic number recognition to more advanced math skills, these blocks can adapt to your child's progress and provide continued educational value. It is an amazing toy that combines play and learning in a delightful way. Your child is sure to have a blast with these stacking blocks while gaining valuable skills and knowledge. - Each set comes in a C&F Zip Bag & with an organic cotton drawstring storage bag. - Non-Toxic - BPA Free - Phthalate Free - PVC Free - Lead Free