Telescience!!!

At round start, the x and y coordinates get a random offset from 1 to 10 and you must use GPSes to figure the offset out. Onc this is don you can teleport items, closets, and people to and from the telepad in telescience. Side effects include mild irradiation, minor spontaneous combustion, monster spawning, and acute inability to do first-grade math. For ages 7+.