Generally, I need about seven hours of sleep to be a fully functioning human. Over the last week, I've probably gotten an average of four, as my one year old daughter has somehow gotten her sleep schedule reversed.
Yesterday, I chaperoned a field trip to a "You Pick It" farm for my three year old's daycare. My fatigue made it somewhat difficult to be patient and kind on a school bus full of screaming toddlers. I did quite well, but it was a bit of a struggle. Anyway, we rode on a bus for an hour and a half, walked all over fields picking odd vegetables (Diakon? Kohlrabi? Who thinks up these names?), had a large lunch, and piled back on to the (now quite toasty) schoolbus.
Suffice it to say that I'm glad that schoolbuses have plastic seats; otherwise my drool might have stained.