Wall cards are great because they can cover large and odd shaped spaces. And frames are great, but there are other creative and adorable ways to display them.
Simple ways to display:
1. string them on a ribbon.
2. tack them right up to the wall
3. Set them on top of your child's toys (tea cups, blocks, books)
4. Create a mobile. Place the cards back to back and clip them to a ready made mobile. Check out Kikkerland photo mobiles- they work great.