Most mother rabbits will not hop into the nest (or box) to check on their infants during the day, although she is usually watching from a safe distance. This is normal behavior.
Rabbits feed their offspring only once or twice per day and will only do so when they feel safe, usually just before dawn and/or just after dusk. If humans and children are continually gathered around the cage, the mother may become too stressed to nurse the infant. Watch as you get a rare insight of what rabbits are like with their babies it is so adorable! See how she keeps them warm and washes them making sure she feeds them all .Beautiful!!