I have to keep my DD up 2 hrs past bedtime and get her up 2 hrs early I need suggestions on things keep a tired 3 year old awake and having fun.

Why??

I agree... Need to know why before I can give suggestions.

Ah to have that problem I normally can't get my son in bed even when he is exhausted. You could try playing a game with her or doing activities that don't allow her to sit down and get comfortable like dancing to the radio.

I can't say to the rest and she will not be happy but if you put her in a carseat and no one is next to her keeping her awake, she IS going to fall asleep

My youngest has had to have EEGs and the first time getting him to the appointment was difficult. He had had about 4 hours of sleep total and hit the wall about an hour before we left. We gave him a piece of gum to chew because it was new and exciting for him. It was still not easy keeping him awake, but he did sleep the second they needed him to sleep.

Hope everything goes well and you get the answers you need.

Engage her in some kid of activity. A board game, build blocks, in short, PLAY WITH HER!
No TV, no stories, no riding in the car.

just playing gets them going. just keep playing with her.

candy and movies.

my fiance has an eeg tomorrow too

Just tell her Sleping Beauty. It's kept mine up for two damn days!

Sorry, hope everything goes well with the medical stuff.