If it's fairly warm where you are, that is probably why they aren't wanting to nestle down into the fur to keep warm. You still want to keep a little bit of fur in there in case they get cold, but if it is warm where they are at, then you don't want too much fur that they overheat. You will need to keep them and the fur in the nest box for about another week. In a few days they will start to open their eyes, and soon after that they start venturing out of the nest. Once you can't keep them in the nest anymore, clean it out and turn it on it's side(if a hardsided nest box) and put a pile of hay in there for them to nestle into when napping. This all happens around 14 days old. Also if by 12 days all their eyes aren't opened. For the ones still shut, you can wipe very gently with a warm wet cloth to help with them opening, but don't force them open at all. Watch for signs of gooey eyes. They should all be open by 14 days.
Once they are venturing out of the nest, if you have them in some sort of cage, just make sure that the bar spacing isn't too large that they could squeeze through the bars and get stuck or fall out of the cage.
For the transition onto solid food, I found that they can have a hard time transitioning safely onto mom's pelleted food. What I did for my babies was place mom's food dish as high as possible, so that mom could still get to the pellets, but the babies couldn't until they were a bit older. They would occasionally get a few that mom dropped onto the ground, but otherwise they were mostly eating the grass hay, which is really the best thing for them in the beginning of starting to eat solid foods. Just make sure there are small enough stems and pieces for tiny bunny mouths. So encourage lots of hay eating, try and minimize pellet access and consumption for the first week out of the nest, then gradually let them eat a little bit more. But really what happens is as they get bigger they can start to reach mom's pellets, and so that's how they gradually start eating more of them.
Also check their bums at least twice a day for signs of mushy poop and keep it cleaned off so it doesn't cause an impaction at the opening from dried fecal matter. If there is mushy poop, try and reduce access to pellets more, as this is a sign of a bun having difficulty adapting to the carbs and sugars in the pellets. And make sure the babies are eating the grass hay well. This helps with mushy poop and digestive upset better than anything. And don't feed treats or veggies til they are older, at least 12 weeks.