Taking an off the shelf free flight glider and turning it into an RC motorized airplane, using micro brushed motors to power its flight, a very fun and simple project to make.
This is an airplane you can buy for about $10 on ebay, you can find even bigger models, and then buy the electronics to make your first RC airplane yourself.
Heres the unboxing and overview of the ZOHD Dart 250G, I have got the FPV PnP version here, with FPV camera & Kopilot Autopilot and very much look forward to putting it together