Mould King V12 Engine Building Blocks Sets, RR Luxury Car Engine Model kit That Run, STEM Model Engine, Physical Science Experiment Model, Best STEM Toy Gifts for Kids/Adult Product Feature: Build Your Own Engine ModelThis is RR Luxury Car Engine, which is V12 engine, arranged in a V-shape.It is the most popular technic engine for car enthusiasts and fans, which equipped with 12-cylinder , providing robust power output,enowned for high-flow cylinder heads, ensuring excellent performance even at high RPMs. Electrical Dynamic VersionWith 1*M motor and 1* battery box. (REQUIRES 6 AAA batteries, NOT INCLUDED). This V12 Engine Model Kit is electrically driven mode,which can be run after assembly. Its design can achieve high power output in a limited engine compartment. Reverse Rotation ButtonMini V12 engine equipped with reverse rotation button design. Pistons propel the engine, demonstrating true mechanical precision, provide you with a captivating, lifelike experience. STEM ToysThis model kit is a wonderful activity together with family or friends. This model engine kit will promote your child's hand-eye coordination, divergent thinking,problem-solving skills,inspires creativity and brain development. Helps children learn collaboration and teamwork,It makes science, mechanical masterminding, and even movement empowerment from start to finish. Gift Box PackedThis construction toy with colorful cardboard packaging is a nice gift for construction on Birthday/Children's Day/Christmas/New Year, especially for kids, teens, adults ages 8, 9, 10, 12, 14 and up. All of my company's products have been strictly checked before shipment. However, in the unlikely event that you do find any missing pieces. Simply contact to us via email and we'll immidately sending you the missing parts for totally free ! Product Specification: Item Weight: 2.2 pounds Item Dimensions: 4.17 x 5.79 x 10.24 inches You Get: 1 x Mould King V12 Engine Building Blocks Sets Before you place an order, please provide me with English information to facilitate our delivery and logistics