I never know what to do with my kids art. It fills up my fridge way too fast--and it's always falling off. My laundry room is tiny so I thought I could brighten it up by displaying their art on the walls in there. It worked great for a little while but then, with the moisture and humidity, the tape lost it's stick and the pictures were always falling down. So I came up with another solution . . . so far it's working great!
First I got some clothes pins and had my boys paint them.
I then figured out how long I wanted the ribbon to be and how far apart I wanted the clothespins spaced out. After hot gluing them I attached a ribbon at the top to act as hanger.
I think that if I had more wall space I would have glued the clothespins horizontally in order to be able to hang more pictures up. Just experiment around with what works best for you!
Go here for some more suggestions on displaying your child's artwork.