[quote=@stardust]
I'd build the ultimate brick shit-house, within which people could take regular shits.

The ability to never lose screws.
[/quote]

You know those dye packs they put in bank money? Eff that. Put a tiny screw in there. I'll find the culprits eventually.

The ability to make water evaporate by staring at it long enough. Rate of evaporation is normal.