HABA Happy Quartett Soft Block Set Each with a Unique Sound for Ages 6 Months and Up This fabric block set is perfect for baby's first blocks. Each cube measures 3" x 3", has a different color, patten and texture and makes its own unique sound. They are also super soft! This STEM toy fosters learning as children push, grab, stack and even notice their reflection in the mirror. Winner of the Parent's Choice Approved Award, this toy is machine washable on cold. Suitable for babies aged 6 months and up. Comes packaged in a practical clear bag that can be reused for storage. Materials: Cotton/polyester. Foam filled cubes.