Dynamic Track Configurations Colorful interlocking cubes build flexible track layouts including vertical climbs, curves, and multi-directional twists.  Safe, Durable & Easy for Toddlers: Designed specifically for ages 3+, this train set features child-safe, non-toxic materials with smooth edges. The pieces snap together and are easy for small hands to take in and apart. The electric engine requires no complicated setup—just place it on the track and watch it go! Strong Compatibility---The internal structure of the toy’s building blocks is universal, so different versions can be combined for use. In addition, the rail tracks have a small storage volume, making it easy to carry around. Even if some blocks are lost, the entire toy will not be rendered useless. Safe & Easy Assembly – Made of BPA-free material with smooth, rounded edges, the race track pieces lock firmly for seamless racing Electric Track Racing STEM Toys Spark Creativity and Learning Enthusiasm! Preschoolers can build basic road systems to develop hand-eye coordination, while kids aged three and up can use magnetic tracks to create more complex patterns. — The perfect choice for birthday gifts, travel companions, or family learning activities. Cultivate fine motor skills and logical thinking through play Item Name: Track Train Toy Material: Plastic Battery: Built-in 150mAh Rechargeable Battery(Included) Features: DIY Track Building, Hands-on Skills, Educational Size Details: Train Length: 5cm/1.97" (Approx.) Notes: 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. Package Includes: S: 1 x Track Train 1 x USB Cable 13 x Blocks 32 x Accessories or M: 1 x Track Train 1 x USB Cable 23 x Blocks 32 x Accessories or L: 1 x Rail Car 1 x USB Cable 31 x Blocks 36 x Accessories