To work successfully a circuit needs power and active component connected by a conductive material. The circuit needs to have a clear path with no gaps or crossovers. If your circuit is not working check

• Check that the positive and negative are connected correctly. Turn the component around and see if it works.
• Does the battery have power? Check it with a different TapeBlock and see if it works.
• Check that all of the components are firmly attached to the tape. Rub them to make a firm connection.
• Check that there are no gaps in the circuit path.
• Check if the negative and positive tapes are touching. They should not, there needs to be two separate lines.