Ruby, Lena and Charlotte are three young girls who built a secret knock gumball machine by following Steve Hoefer’s instructions in MAKE. As demonstrated at Maker Faire Bay Area 2011, a special knock (shave and a haircut, but don’t tell…) activates the gumball dispenser. For their next project they are thinking of designing a car that looks like a camel.
- Maker Pioneers: Kurt Fleischer
- Steve Hoefer’s secret knock gumball machine on Make: Live ep01
- Secret knock gumball machine in MAKE v25