This Stem Qboidz Set from Engino is perfect for preschool children to start building while learning and practising STEM. The Qboidz system combines the award-winning snap-fit connectivity with the effortless building feature of stackable blocks! The set encourages preschool children to develop their cognitive, social, and motor skills through fun and creative play. This set includes enough parts to build models out of a library of 20 different ideas. The system is designed to allow for four different levels of building complexity, allowing younger children to still be creative while also challenging them as they grow older. It includes 195 plastic parts, 1043 Connecting points and digital instructions for 20 models, also comes with a plastic storage tub for storage. Perfect for three to four builders. Suitable for ages between three to six years.