Air pump and switch for two model cars to race. Answered
We are making small model cars and hoping to race them at school.
We hope to propel them with air from a bike pump.
What we want to do is race two cars side by side, triggered by a switch that triggers both cars at the same time down a track.
A ready-made kit is expensive and I am hopeful that some amazing person out there could design/make show me (a non-tech person!) how to achieve this.