It's hard to have something available when you check into your room as your room number may not be confirmed and your room may not be ready. You can use Disney Florist
to have something arrive after you check in.
If you want to plan some other sort of surprise, you can have something shipped to your resort which you can sneak into your room as a surprise.
I think you have another post about Bibbidy Bobbidy Boutique
which I responded to but here is the information about services offered.