Yes keep feeding them! A dish of water is also a godsend each night. As for them getting up to naughtiness, just leave them to it.
If one of them manages to produce sprogs your may see an adult around at odd times of day if she’s got ankle-biters in the nest. Do not worry, it’s perfectly normal! Shortly afterwards the kids will be running around, just be aware that their mouths are tiny so it helps if their food is in small, chewy bits. I use Spikes Semi-Moist hedgehog food when hoglets are about.
Any quessies, bung them up here. We all want to help!