Feature: 1. The new creative homemade submarine DIY, the shape is delicate and realistic, enlightenment children know more common sense. 2. DIY Technology makes small scientific toys, develops intelligence, improves thinking, cultivates left and right brain development, and develops logical thinking organizations. 3. Diving experimental teaching equipment, training children's cognitive ability, observation ability, memory ability, understanding ability, coordination ability of various parts of the body. 4. Made of high quality plastic, this product is sturdy and durable. 5. Parent-child communication, interactive toys, increase parent-child relationship. Specification: Item Type: Toy Name: Homemade Submarine Material: Plastic DIY: Yes Packing: Opp Ziplock Bag Ability Development: Intellectual Development Science And Education Toy Type: Physical Class Applicable Age: Juvenile (7-14 Years Old) Applicable People: No Limit, Boy, Girl Ability Training: Manual brain, interest training, intellectual development, hearing, parent-child communication, interactive toys Package List: 1 x Tube1 x Submarine2 x Screw2 x Balloon1 x Nozzle1 x Syringe