They just kept expanding upon their original squishy circuit design. It started off small but then it got really complex. What impressed me the most was their dad. He was this tough looking dude but even he got into it.
I tried to give them some privacy but every so often I would pop in to give them tips and ask the girls leading questions about how electricity and circuits worked.
They spent almost an hour just making and having fun. Afterwards, they asked me how they could get more involved and I gave them a flier for the NYC Maker Faire. I felt like we had really helped spread the Maker Movement.