This is a project that I made with my 3 children as christmas presents for this year. We got different sized acrylic(?) balls (and hearts). We filled one half with decorative snow which you can get around christmas time in most stores... I bought mine after christmas in clearance. To make them more fun and as I have 3 girls we also added different colored glitter. All you have to do then is close the balls/hearts and add a bit of twine so they can be hanged from the tree or where ever you want to put them up.
I am considering to put some bowes on the top part, but I'm not quite sure yet.