1 for Casper, 8 for River?
casper: the maximum amount of time casper can sit and do nothing is maybe three minutes. it will start with finger or foot tapping, then fidgeting with his tie and leg bouncing, and then he'll have to get up and move somehow
river: probably to stop climbing on and hiding in odd places. she was (and is) like a cat, they'd just find her in cabinets randomly