Bir 3D Electric Train Set With Flexible Race Track Anti Gravity Car STEM Educational Building Toy 81Piece

This 3D Electric Train Set includes a USB-rechargeable locomotive and a cube-track system available in 51- or 81-piece configurations for building multi-level rail layouts.

Non-magnetic attraction Dynamic Building System enables varied configurations with loops, continuous curves, crossroads, and arched tracks.

The track blocks are ABS plastic, about 4 cm x 4 cm x 4 cm (1.57 in each side), with a new intuitive connection structure for easy assembly and stable layouts.

Package contents: 51/81 pieces, track pieces, connectors, an electric train, USB charging cable, and assorted accessories to build your chosen layout.

Developmental play: fosters cognitive development, critical thinking, problem-solving, and fine motor skills; supports parent-child interaction during collaborative building.