Feature: 1. MULTI SPECIFICATIONS: The kids assembly toy kit includes various specifications of models to meet various DIY needs, helping kids learn while playing. 2. STEM EDUCATION: This toy kit aims to provide kids with science, technology, engineering and mathematics skills, promoting comprehensive development. 3. DURABLE MATERIALS: These building boards are made of excellent EVA material, lightweight and durable, wear and impact resistance, and has a long service life. 4. MULTIPLE USAGES: Help improve kids hands on and brain skill, cultivate multiple thinking creativity, and stimulate learning interest and thirst for knowledge. 5. EASY ASSEMBLY: Each project is equipped with complete accessories, making it easy to assemble, no need to remove materials from other projects. Specification: ​ ​Item Type: Kids Science Experiment SetMaterial: EVA Wood Shaft Material: Log Wood Battery: AA Battery (not included). Package List: 10 x KT Boards 2 x Wooden Shafts1 x Double Sided Tape1 x Glue1 x StickerColorful Water Wheel Accessories:1 x Tee Pipe2 x Hose3 x Shaft Sleeves1 x Paddle Wheel4 x Single Side Strips1 x 5cm Syringe2 x Measuring Cup1 x 8cm ShaftFortune Cat Accessories:1 x Pulley1 x Paper Jam2 x Short Shafts1 x Crank Handle4 x Limit Rings1 x Major ShaftGrating Tv Accessories:2 x Turntable1 x Flat Head Shaft4 x Limit Rings1 x Foam Strip3 x Cartoon Drawings1 x Grating1 x T Sleeve2 x Metal Shafts1 x Metal Short ShaftDelivery Man Accessories:2 x Rear Wheel1 x Front Wheel1 x Limit Ring1 x Battery Box2 x Pulley1 x Gear1 x Rubber Band1 x Terminal2 x Rocking Bar1 x Worm4 x Flat Head Shaft1 x White Bushing1 x 130 Motor2 x Long Shafts2 x Short ShaftsStar Light Accessories:1 x Battery Box1 x Lamp Holder1 x Light Bulb1 x Sky PVCRocket Transport Team Accessories:1 x Cotton Thread3 x Small Balls2 x Big Pulleys2 x Small Pulleys2 x Flat Head Shafts2 x Long Shafts4 x Embedded Bushing4 x Limit Rings2 x White StrawsDouble Track Slope Accessories:1 x Marble Note: Customers need to purchase the corresponding number of batteries according to the battery case equipped with each product.