You can make 'em and hang them with tape on your walls, in your locker, or even stick a magnet on the back on throw them on your fridge!
Personally, I like to make a bunch of these hearts in assorted colors during the Valentine's season (with small notes inside) and give them to my friends.
If you want to learn how to make these hearts you can watch the video at this link:
Or you can request that I make an instructable in the comments below!
Thank you and Good Luck!