【3D Wooden Velociraptor Jigsaw Puzzle】This 3D wooden Velociraptor puzzle is made of natural wood and is precisely joined and laser-cut to replicate the outline of this prehistoric top predator. It can also accurately reproduce its "bouncing bipedal gait", making it a prehistoric biological mechanical model with both collectible and scientific value. 【Spring Energy Storage Transmission】This 3D dinosaur model building kits requires no batteries and uses a spring-powered transmission design. Its 106 precision parts work together - just wind the spring six times and release the brake paddle, and the velociraptor will instantly switch to "hunting mode" 【Visible Mechanical Secrets】The fully exposed gear structure allows for a complete visualization of the power transmission process – without disassembling, the energy stored in the spring can be seen. Children can intuitively perceive the principles of kinematics and unlock scientific knowledge through fun. 【Shockproof And Anti-Slip Design】The Dinosaur 3d puzzles foot structure is ingenious: the "spring Achilles tendon × diamond-patterned rubber pad" in the hind limbs optimizes foot adaptation for a more natural bounce; there are 189 precision-cut parts, and a novice can complete it in about 2.5 hours. Come and enjoy the hands-on fun. 【Perfect Holiday Gift】It's naturally festive, perfect for under the Christmas tree or in a New Year's gift box. It allows children to unlock new joys during the holidays while also providing a hands-on and creative experience for friends and family, offering a more creative twist than just a typical gift. ROBOTIME Dinosaur 3D Wooden Puzzles, Dinosaur Model Kits can Walk, Mechanical Dinosaur STEM Toys, 3-D Puzzles Building Kit Gifts