Also: this is a FUN ficathon. A ficafunathon. Funaficathing. Something like that. The sillier, the more carefree, the better! (Although, if you end up writing the Best Thing Ever, we'll love it, no matter what.)
If you are stumped, if you need any help, feel free to ask! The HP fandom (where the idea was taken) has an entire community devoted to these types of fics, found at

Lastly, and OT: Happy Birthday to