This class teaches mechanical engineering using a DIY automatic bubble machine kit. The kit was available from Amazon for $8.99. Two electrical motors are included in the kit. One motor contains a gear box. The students connect the wires to the motor and in that way learn about conductivity and electric circuit. The idea of having a fun toy when this is over provides incentive to learn these tasks. The student learn some fine motor skill assembling the project.
Purchase from Amazon for $8.99