Ah Multis... what funny creatures.
I have owned them and bred them, and i have to say, if your looking for multi's as a cuddly pet like mice, or a pet to breed for cuddly babies, then please dont.
True, i had Gizmo, and he was one in a million. But trust me when i say, in a million. Its rare to find a multi that is handleable, and i know of a lot of multi owners who's multi's actually run at them when they put their hand in the cage to attack.
They are not a cuddly family pet, and the only real reason to breed from tham is for snake food, unfortunately. There is no work with colours, i only bred to try and breed some friendlier multi's.
On a posative note they are very fun to watch, active and will play and chew anything, though quite a few of my friends and myself know they are absolute escape artists and can escape out of most things unless its glass!