These inserts are custom designed to fit the large or small TROFAST storage bins from IKEA, making them a perfect addition to your sensory play setup. Each insert is made from mirror acrylic, a reflective plastic material that adds an engaging and fun element for children. Please note that acrylic is a hard plastic material and may break if dropped or used roughly, which could create sharp edges. For this reason, inserts should always be used under close adult supervision and discarded immediately if any damage occurs. ️ Safety Warning Small accessories are not recommended for children under 3 years old or for children who are still mouthing, due to choking hazards. All children, regardless of age, should be closely supervised during play. This product is intended as a sensory tool, not a toy.