JMBricklayer 3-in-1 Mini Engine Building Block for Adults to Build, V6 B4 L4 Model that Runs, STEM Mechanical Brick Toy, Home Office Decor, Collectible Technical Gifts 14+ Car Lovers

【3-in-1 Engine Models: V6, L4 & B4】 The JMBricklayer 60023 lets you build three complete engine models from one set: a V6, an Inline-4 L4 and a Boxer-4 B4. Each model is assembled separately, allowing builders to explore and compare different cylinder layouts and mechanical structures. 【Hand Crank with Moving Pistons】 Turn the hand crank and watch the pistons and crankshaft move in a synchronised motion. The visible mechanism makes the internal movement of each model easy to observe and adds an interactive element to the building experience. 【Explore Visible Engine Mechanics】 The open structure allows you to view the cylinders, pistons and crankshaft from different angles. The three configurations demonstrate different engine layouts, making this mechanical building set an engaging project for car, engine, engineering and model-building enthusiasts. 【711 Pieces to Build and Display】 This building set includes 711 pieces with step-by-step instructions for a structured assembly experience. Each completed engine measures approximately 10 × 10 × 7.6 cm, making the models ideal for desks, shelves, workbenches, learning spaces or display cabinets. 🎁【Gift for Car & Engine Enthusiasts】🎁 This 3-in-1 engine model kit combines creative building, mechanics and model making in one compact project for adults and teenagers aged 14+. A distinctive gift for birthdays, Christmas and other occasions, especially for car lovers, engine enthusiasts, STEM fans and anyone who enjoys mechanical models.