I think I've lurked for a year now. I'm in Site 19 sometimes.
So I'll pitch some ideas here that I might write up eventually. Shoot them down early if they suck.
1) Broken Indicator: A universal indicator used for that has different effects depending on acidity of the liquid.
Each of the main colors would produce a different effect, like temperature changes, state changes, separation of solution into component elements or something along those lines. It might have a mechanism where if left in a closed system, cycles through the colors?
The indicator and spool is an organism of some sort.
2) Wanna See a Card Trick?: A card trick(maybe transferred memetically?) that gives people the ability to manipulate space, but only within the context of the trick. The trick must be performed for an audience and is then transferred to one(or more?) of the viewers. The original performer then loses the ability to do the trick, but still insists on showing it to people.
3) Kilroy: Kilroy as an SCP. I mean, we have Big Foot already. Probably not the best thing to start with though.
4) Risky Role Play: A Risk-like ripoff board game that causes players to become take on roles of their individual countries(May not be countries, variable game setups, different empires have different play styles that players adhere to). The game may or may not kill off players depending on which Empire won.
Comments and questions please.