Wooden stacking blocks of 18 cylindrical wooden blocks in 6 colours and 3 sizes (different diameters) with a solid crescent moon shaped base.The aim of this stacking and balancing game is to stack and balance as many blocks on the moon as possible without them collapsing. It can be played by a single person or up to 4 players, with different game options, including those of the player's own devising.This colourful and educational sorting toy is designed to teach children about colours, sizes, weights, counting and introducing conception of fractions. It helps to develop children's' hand and eye coordination, concentration, patience and encourages them to thinking strategically and to problem-solving. It can be used as tool for Math Montossori learning and teaching resources.Suitable for 3 years plus. It is always advisable that an adult to supervise and enjoy the interaction of children with this toy.Safe and Environmentally Friendly: Toy safety and children's happiness are our top priorities. We make our wooden toys with pure love and care for our children and the environment. Our wooden toys are made of sustainable wood with environmentally friendly and non-toxic paints. It conforms to EN71 and CPSA Standard and is tested and is certified by International Accredited Labs. We are committed to customers' total satisfaction.