This is a very simple card that can easily made in numbers if you give out Valentine cards at school.
You need:
Card stock in pink and red
3D tape
Scissors
Glue stick
Patterned pink paper
1-Fold the pink card stock to shape like a post card
2- Use the red card stock to cut out hearts just big enough to cover the middle of your pink card
3- Tape a few 3D tapes at the back of the heart
4- Tape the hear in the middle of the pink post card
5- I like to cover my fold line on the heart with small cutout hearts. You can do the same or leave it as is.
6- A nice message of Happy Valentine or Be my Valentine will be a nice touch in card.
Happy Valentines day