Easy to connect discs feature eight different slots which allow children (and adults) to build amazing imaginative structures. Discs come in various translucent colors including red, green, blue and yellow. Specially designed for ages 3 and up. Each disc is the same size, allowing for easy cleanup and convenient storage. 50 piece set, each disc measures 4 inches in diameter. Constructive Playthings is committed to providing safe, compliant products and a healthy, safe working environment worldwide. We require that all products meet all applicable federal regulations, which we review on a continuous basis.