Nice, I have a mini drone too, probably smaller than that one, wanted to just get my feet wet too before I buy a big one. It's cool but range sucks (even just straight up line of sight it drops due to loss of signal) but for what I paid I can't complain.
Eventually want to buy a better one or even build one. Basically you can buy all the parts and just assemble them. I'd probably build my own frame, something rather basic in wood or something.
One of these days I want to also build a weather balloon drone. Essentially a payload lifted up with a bunch of sensors and stuff and maybe even a camera. Something that will transmit APRS and maybe video. I need to read up way more on ham radio first and eventually get my license. If you use those aluminium "happy birthday" balloons you can have it circle the earth several times before it finally dies.
What would be really cool is to actually launch a drone from a weather balloon then fly it down. Too bad it would be illegal though. :/