Okay so there have been a lot of negatives about keeping rabbits on here.
We've had a few rabbits over the years and currently have 2 boys we took on from a work friend who was moving.
We lost 2 to fox attacks(one dug herself a burrow and refused to go to bed so was out overnight), one died from complications from her Spey months after it was done.
Just because rabbits are siblings or are young together doesn't mean they will be friends when they are older.
Un bonded bunnies will really fight- I mean try and kill each other fight. It is possible to bond two bunnies but it requires separate pens and lots of patience. This is why I only recommend getting a prebonded pair from a rescue.
I paid around £70 for a playhouse from b&q that had been sat outside for a while so needed a bit of tlc, for a run I have penned in the underside of our 8ft trampoline with pen sides I ordered to fit on eBay and used cable ties to attach. I have insulated the playhouse and linked it to the 'run' with a tunnel so they have 24hr access to the run.
Our garden is 100% rabbitproofed- as I said we've had many rabbits over the years and learnt all the escape routes.
Rabbits can climb byw and are fairly intelligent- mine will actively show me where they've been planning an escape.
They have free run of our garden during the day and go back to bed on command before dusk. They can be trained but also like to misbehave.
All our flowers are caged to protect them and they eat anything they can reach. Our garden isn't a beautiful flowery one because of them.
We have never had problems with teeth as they eat grass, chew trees and the rest of their diet is hay. Same with claws.
They aren't very friendly and don't really want a fuss but will hop around your feet and they trust small children more than adults. The smaller the child the more strokes they will tolerate, I can hand feed them.
No one tries to pick them up though- that results in nasty gashes from their sharp claws.
I love having the rabbits free ranging in the garden, they are happy and will pop into the house when the doors are open to say hello, they play chase with the cats and are generally fun to watch. But they aren't the best pets as starter pets.
There are some rabbit forums around but the people on them tend to be quite rabbit militant and a bit mad away from the rabbit chat.
If you really don't have a choice then do some research. Prime your child to inform daddy the cage isn't big enough and he needs to get them a playhouse and run. Send him links to www.runaround.co.uk for warren lodgings.