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.
A complete timelapse recording of how I built my hexacopter drone with DJI`s F550 Kit, with a list of the parts and tools I used to complete this build