Given your total screen-on time so far on this charge, I'd say your battery life looks relatively normal, since you're on track for 6 hrs of total screen-on time. I wonder how accurate your daughter's battery stats are, or perhaps she partially charged up midway through, because if she truly is down to a battery level of 65% with let's say 4 hrs of screen on time, that means she's on track for more than 10 hours of screen on time, which is unheard of (unless she's rooted and running a custom ROM).
It would also be helpful to see your cell signal strength. If the system menu doesn't show it (usually if you tap the battery graph to make it fullscreen), then you can install GSam Battery Monitor or something similar to see it. Poor cell signal can drain battery (and you can still have poor signal but 0% Time Without Signal).