California mansion on their spring breaks, and contact her when they feel homesick.

FORBES: World's Richest Moms Tory Burch, Meg Whitman, Even Oprah Make Motherhood Work

And they will not be able to receive surprise presents, like special cookies or favorite movies, which are often brought to the space station on supply shuttles when someone starts feeling homesick or maybe a little blue.

CNN: Mars on the brain? Red Planet pioneers to face cosmic mind trip