I have a female rat who loves it when I put my hand in the cage.
She runs all over it then down the stairs then back up and then bounces, try's to get the other girls to play and then comes over and licks my fingers.
Oh yes, all my girls do this, but especially Fiona and Lana. When they come out for free-range time I'll tickle them and they'll get all frisky and hop around. Fiona will make a full circle around my room and then come back for more. :lol: