L.K.
First go to businesses that you frequent. Times are tough and businesses are cutting back on their charitable donations, but if it is someone you have a relationship with they are more likely to do something because they know you. Your dry cleaners? Vet? Grocery store manager? Insurance agent?
Then go to people/businesses you feel comfortable asking. Have all your information together.
You plan on donating so many wagons and they cost X amount each. The wagons will be used for. . . by. . . Do you have a picture of your daughter in one of the wagons when she was a patient there? Put the picture, or any picture of your daughter on the flyer with the info. It gives a face to why you are doing this!
Bless you and Good Luck,