SumBlox are a groundbreaking way to learn math through play. Each block's height corresponds to the value, so adding and subtracting is as simple as stacking blocks. This set includes 38 solid wooden Mini SumBlox blocks and a pack of 38 activity cards. The tried and tested use of SumBlox as an educational tool has been widely developed and applied, and now the introduction of SumBlox Minis makes more detailed and complicated math problems more manageable. The inclusions of the activity cards helps parents and educators get the most out of engaging with SumBlox. The cards demonstrate how to make learning fun and playful. This is for children ages 3+, the set contains small pieces and children should not be left unsupervised.