Looks normal to me. hd netflix for 10 hours each , i bet you listen to youtube when playing or your son does, 7 hours playing from him the rest may be having it play in the background to listen. looks like you fell for the false assumption that nobody can use 100gb of bandwith a month or something because you never realistically tracked the data. ISP's take advantage of that lack of perspective, they foster that assumption as most people dont really watch online video that much or play games or download. Most of them are ms's who just read facebook and check vapid blogs but you have an internet savy familly, need a provider without a monthly bandwith limit.