During a LEGO-Based Therapy (Often referred to as Lego Club) session, three children of similar ages and abilities work together to build a LEGO model.

Each child takes on one of three specific roles to do this:

• The Engineer oversees reading and relaying the instructions. The Engineer must tell the supplier what pieces to retrieve and tell the Builder how to build the model.
• The Supplier oversees finding the correct LEGO pieces. The supplier must listen to the Engineer and figure out what piece to retrieve, and then give these pieces to the Builder.
• The Builder oversees the physically building the model. The Builder must listen to instructions provided by the Engineer and receive the pieces that are retrieved by the Supplier.

Using this format provides each child with an opportunity to practice and develop a wide range of skills, including language skills (in both giving and receiving instructions), turn-taking, negotiating, sharing and collaborative social problem-solving. It also encourages children to reflect on their own actions and skills, as well as give constructive feedback to their peers.