Feature: 1. Never Gets Wet: The sand is poured into the water and taken out again. It is still dry. There is no water at all, which will surprise the audience! 2. It's More Fun: It's a new way to play sand in water. Use your imagination! Greatly enrich one's mind! A powerful and unconstrained style. 3. Endless Possibilities: The play sand toys can be used to build underwater sand castles! It' s great fun for children and even for adults. 4. Reusable Science Toy: Build sandcastles under water, then simply pour the water off and let the sand dry! You can use it for science experiments. 5. Learn About Water Molecule Properties: Discover the colored sand and real sand for a fun science experiment or lesson! Also suitable for aquarium landscaping！ Specification: Item Type: Play Sand Product Material: Sand Product Weight: Approx. Net Weight 50g / 1.8oz (the error of 2g up and down is within the normal range)Applicable Age: 14-18 3C Configuration Category: Toys Over 14 Years Old. Package List: 1 Bag x Sand Note: 1. The product contains fine particles. It is forbidden for children under 3 years old to use it to avoid danger caused by ingestion.2. Please wash your hands carefully after using the product!3. Children should play with this product with their guardians!