gather your materials, you will need construction paper, a transparent plastic (i used the one you use to put papers in), glue, and anything you want to decorate your card with.

you first get your construction paper and fold it in half and you cut a whole through the front, this can be any shape or size, i left mine a standerd rectangle :)

you set aside your construction paper and you then take your transparent sheet and cut it to match the shape of the hole from your construction paper, only make it slighty larger (did that make sence??? probably not lol sorry) make sure it's like a bag

you now cut out diferent little shapes and color them to your liking, i chose black hearts and pink bats :), and you put them inside the plastic bag you cut out from the transparent sheet

you now paste it on the hole fromt he construction paper like so...
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you are now officially done! the rest is up to you how you want to decorate it, you can shake your card to see your little shapes moving around :)