They dropped the hearts and glitter on the contact paper. This is the fun part :)
When they were done, I put another sheet of contact paper on top to "seal" their arrangement. Then I cut hearts from it, punched a hole in the top of each heart, and added something to hang it with.
If you are going to hang them in a window it looks best with fishing line.
I think we've made about 10 of these. They are so easy and pretty :)