Natty and Charlie are 20.
This was Natty’s idea. She didn't know that, but it was, because she’d mentioned some little thing about working on helicopters, and then he remembered an old toy helicopter he used to take apart and put back together. She remembered that, not him, because she was so incredibly smart, and she noticed things, and she knew him in ways he didn’t even know himself sometimes.
So Charlie blew off studying in the twenty minutes before his Biology exam. He'd studied hard enough already, and he didn’t really care about the genus of frogs right now. He ducked into the electronics lab and he picked up the tools he remembered playing with so many years ago. These were more powerful than the ones he played with as a boy, but he knew what they did. He grabbed a few scraps and put something together, a battery at its heart, electricity, life. It worked.
It was crude, but it worked, and that filled him with more joy than he could explain. Fuck yes. He felt refreshed and alive and excited like he hadn’t been in a long, long time. He couldn't wait to tell Natty.