Ideas to keep a five year old entertained:
Chalk on the sidewalk
Make "sculptures" with toothpicks and frozen peas
Hopskotch--if it is raining, inside on garage floor, or use yarn or string to outline it on the carpet
Jump the river--yarn that gets wider and kids jump over
Dress Up--high heels are always a big hit, and help her put "big girl" make up on, oh, and of course a manicure with real nail polish---then let her polish your fingernails and toenails
I know it has been mentioned but play dough is a great winner
use gadgets and cookie cutters from your kitchen to play with, let me know if you don't have a recipe
Cut and paste--old magazines, a pair of scissors and a glue stick
(or you could let her glue with Elmers glue scraps of fabric to make a picture or cover an oatmeal carton or even a glass jar or vase--after it's finished use mod podge (at Michael's) to seal it
Write a story--she colors pictures, you record her thoughts and ideas about each picture, it may even come out like a real story. (she can probably do a little writing)
Paint with food colors--use Q tips for paint brushes
Fingerpaint--use liquid startch straight from the bottle, color it with the food colors (or if you're real brave, make chocolate pudding and fingerpaint with it, you are allowed to lick your fingers
Tea Party Time--have her help making little sandwiches, cookies, etc for lunch--Five year olds can be such good helpers
Oh, I'm getting so excited--I wish I could drop by to help--She is never going to want to leave! Most of all enjoy the time and don't fret--it sounds like you're doing an excellent job entertaining her......