One of the best birthday card ideas is to get a big card that has a picturesque front. You can sign in the wishes and your name at its back. Most of the times, people decorate it in their living room or bedroom as a wall hanging. It stays on with them for months & years ahead. This especially works with the teenagers and kids. They love to place their favorite cartoon and fantasy characters in various places in the house.
For instance, if their favorite color is yellow _ start cutting out images sun, flowers, bananas, and anything yellow from your old magazines, calendars, wrapping paper, and other media. Collect all of your yellow images and glue them onto the front of a white, black, or colored card that contrasts with the color used in the collage. Now use a circular or square piece of colored cardstock and write "Have a Very Yellow Birthday!" This is a fun way to celebrate the individual and a unique way to show your own thoughtfulness and creativity.