What a wonderful little Angel, she is adorable. I have 6 house rabbits and they do make wonderful pets. Congratulations on having the children assume some of the responsibility for her care. Rabbits are amusing and often mischevious pets, especially when you sit on the floor with them.
If you haven't done so already you might want to check out the webite for the House Rabbit Society as they have great information on nutrition, housing, toys and health issues: www.rabbit.org
I hope she is getting plenty of timothy hay (not alfalfa as it is too high in calcium) and veggies, rather than pellets and would recommend you get rid of the wood shavings I see in the picture. When urine mixes with the shavings a gas is produced that eventually effects the rabbit's liver and can cause death. As you and the children know rabbits take every bit as much care and responsibility as a cat or a dog but they are definitely worth it! I hope you enjoy your bunny for years to come.