I'm Babysitting a 4 year old girl and an 8 year old boy tomorrow?

Well for starters, $100 is completely unfair. If you get them at 6:30 then feed them and just entertain them until bedtime (about 8 pm. if you have a hard time getting them to sleep, lay them down on their tummy, rub their back, and hum quietly). Get them up around 7 or 8 am, feed them breakfast, (something easy and healthy) then entertain them until their parents get home (as far as entertaining goes, at night, find a kid movie and say "wow! this sounds like a really good movie! have you guys seen it? lets watch this!) if they don't want to watch movies, ask them what they want to do and they will come up with something. If they have an attitude, then find something they want. something around the house, something special for breakfast, piece of candy, anything really, and hold it over their heads. Make it clear that you are in charge and if they don't do as you say, they cant have whatever you told them you'd give them. A game you might consider is hide and seek, if you find a really good hidin, you can just sit there for awhile. If you keep their attention on something like the wii, you get some time to just sit there, but don't use it to much or else the parents get mad. Be careful with what you do too. Some parents use cameras, called nanny-cams. i had a lady do that to me and she was constantly on my a** about everything. Just be careful, keep them entertained, make sure they know you are in charge! and watch them like a hawk! Hope i helped! Good luck!