It's clear from watching the Sloth Bear Cam that this little cub has a lot of personality—just like Hana! It's not unusual to see the two playing: she will roll on her back and hug the cub, paw at him/her, and exhibit a "play face" (her mouth is open and her lower lip is loose rather than taut).
At 7 weeks old, the cub is still pretty uncoordinated. But that doesn't stop him/her from playfully nipping at Hana's fur, neck, and face. The cub's not on the move quite yet, but it's getting the hang of using its back legs to propel itself forward. In a few weeks, the cub should be climbing aboard mom's back.