Wait until just after Easter, and rescue one of the bunnies people who didn't know what they were getting into. For Easter, you can buy Jaden a stuffed bunny with a "promisary note" for a real live bunny of his own. Then he can go with you to the shelter and help choose the bunny and everything.

See http://rabbit.org for all sorts of information, they are a great resource, and probably have rescue bunnies already available.

The only reason I wouldn't buy a bunny at Easter is that it reinforces the impulse buy profitability for the stores.