My 2 White's are in a 36inch long, 12wide and 30 tall enclosure and they can jump from one side to the other in one jump! (3 feet). They seem happy and healthy enough in there but I felt sorry for the little guys anyway so I bought a 6foot tank to do up for them lol. Obviously not everyone has the space for something that big though. Like Don said, its so much fun watching them, they have so much personality. Mine jump onto my hand/arm if I reach into their enclosure and one of them has a habbit of walking/waddling backwards hehe. Tell your mum I recommend them :P lol