Hope everyone's been having a wonderful finals week!

When David Yearsley, 11, was taking his fifth-grade school photo, he'd thought he'd jazz things up a bit - with a knitted beard hat, no less.

"I had no idea he was going to do it," his mom, Sonja Yearsley, of West Richland, Washington, told ABC News. "It was all his idea."

R2, which has been on the ISS since 2011, has a mission: clean handrails, vacuum air filters and take air-flow measurements. The problem is it doesn't yet have the ability to learn and complete the work. So NASA is looking for someone to teach the bot. The Robonaut Challenge calls on contestants to write algorithms that allow R2 to interact with a training dashboard the space agency built.