DIY Assembling Electric TrolleyAn ultimate combination of puzzle game and logical route building STEM toy. 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. Encourages creativity as children can design their own track layouts and experiment with different configurations. A Variety of ThemesDinosaur, ocean, land, and space themes for you to choose from. The car toy set includes a variety of tracks, loops, and ramps that can be easily assembled to create exciting racing adventures. Play this puzzle track play with your child to enjoy family time and enhance your parent-child relationship. Brain Teaser PuzzlesOn the groove puzzle board, there are indicating numbers on the reverse side of each plate, helping kids to create their own layout plan. With different brain-teasing challenges, the logical rail puzzle kit involves kids' development of imagination, logical thinking, and problem-solving skills. Durable and SafeThe puzzle board games are made of high-quality ABS and have burr-free polished smooth edges and corners and are safe for kids to play. The small car travels along the groove track automatically, which is fun and can keep your kids away from electronics. Perfect Gift for KidsThe fun games can be the favorite gift for 3 up years old boys and girls. Not only the ideal gift for birthdays, Christmas, Easter basket fillers, Parties, Childrens days, Halloween, Thanksgiving, and New Year but also the ideal for indoor and outdoor games, families, kindergartens, amusement parks, preschool learning activities, and so on. They will love this gift and be happy to play with their parents or friends for hours.