All you need is some colorful card stock, scissors, glue, pencil, marker and an envelope template. You can print a template off the internet or take apart an envelope and trace it onto your card stock.
1. Trace your template.
2. Cut out your envelope and fold the edges.3. Cut out 5 different heart sizes in different colors.
4. Glue the hearts to each other. Save one heart.
5. Glue hearts to center of card.
6. Fold edges and glue remaining heart on back.
7. Address with marker.
You may make variations. Blue cards for boys, pink for girls. You may put different shapes in the card, such as stars, favorite animals or flowers.