Construction toy consisting of plastic blocks with sockets and pegs for connection. They come in a variety of complexity levels:
- Duplo
- For little kids. It has larger blocks and is incompatable with regular lego without adapter blocks.
- Basic
- A variety of different sizes of multicoloured blocks
- Themed
- Mainly the smaller blocks from the basic set but in special colours and with a wide variety of special components. Includes
Themed sets are the most advertized and common in toy stores.
- Technic
- Advanced Lego. Has gears, pulleys, and similar components, some blocks have sockets on their sides as well as their bottoms. There are a few motorized components.
- MindStorms
- Lego for Geeks. Programmable computer blocks with sensors and motors. Uses Technic components for structure.