Ideas For Best Short-term ROI?

[Jimmy Holman]

Not sure if this is right forum, but here it is. If you had 3-10k that you know you're not going to personally use for the next 6 months, what are the best ways to grow that money with real estate? 

Obviously partnering with someone that flips houses and needs help with a down payment would be the first choice, but what about lending it out through a RE crowdfunding site? Or just putting it in a great REIT?

I don't want it just sitting there while I educate myself on REI, so what do you guys think?