Features 1. DIY Assembling Electric Trolley: Encourages creativity as children can design their own track layouts and experiment with different configurations. 2. Brain Teaser Puzzles:  With different brain-teasing challenges, the logical rail puzzle kit involves kids' development of imagination, logical thinking, and problem-solving skills. 3. Multiple ways to play: Each puzzle track set can spell out a variety of puzzle modes for any combination, freely disassemble and spell out the track mode you want. 4. Durable and Safe: The puzzle board games are made of ABS and have burr-free polished smooth edges and corners and are safe for kids to play. 5. Perfect Gift for Kids: The fun games can be the favorite gift for 3 up years old boys and girls. Specification Material: Plastic Color: Multicolour Size: 7 x 4 x 3 cm Weight: 80 g Package Include: 1x Assembling Electric Trolley Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.