My son is into building mini kiddie ride using cardboard paper. I thought I'll introduce him to something more realistic.
I have Arduino uno or one similar with chip and motor, I had bought to build 3d printer.
What addition would I need if I want have it detect 2 quarters inserted before starting up the motor and play sound for certain amount of minute. I would like to use something like 2 tap instead of LED sensor I saw on some projects here. Using a push on/off method.
For sound, I saw on youtube there's a sound board for Arduino.