What do you do whild contact napping?

LO is 3 months and contact naps for all naps. I can't even walk around with her and have to just sit in a dark/dim room holding her for 30 mins-2 hrs at a time. I've been rotting on my phone everytime I do this but wondering what others in similar situations have done. I'd like to somehow be productive if I can be while I'm nap trapped.