The baby ferrets are called kits. For nail clipping the best clippers to use are bird clippers. The ferrets quik in their nail is very close to the tip, so you should trim their nails often and with more trimming the quik regresses. They tend to have a strong odor if you don't. Even still when they are descented they omit an unwelcome odor.
Bathing is important on a weekly basis, special ferret shampoo is available at pet stores.
Just be sure to focus on their body and genital area. Use a facecloth on their head area, they have sensitive eyes. They are extremely curious animals. If you don't watch them, they will venture into your cupboards, closets, etc. Harnesses can be purchased for your Ferret if you are so inclined to take them for walks.