Stack them! Squeeze them! Chew them! The Stack N Chew Mini Cubes are a developmental teething toy. They are BPA-Free and made of food-grade silicone, making it safe for baby's tender gums. The flexible holes help strengthen baby's gripping skills. The contrasting modern colours stimulate hand-eye coordination and promote motor skills such as stacking and carrying. Easy to travel with, it encourages imagination - even for water play! Features: -Flexible, Textured edges for chewing -Visually stimulating modern colours -BPA Free -Easy Grip design -Stackable Cleaning Instructions: Dishwasher and Dish soap Safe. Do not microwave. Warning: Do not leave baby unattended with the toy. Monitor for wear and tear. Discontinue use if damaged.