First fold the sheet of green cardstock paper in half to make a simple card shape.

Next up - trim down the pink cardstock paper, so it fits on the front of the green cardstock card you just made. This will give the appearance of a watermelon slice.

Glue the newly cut pink cardstock piece to the center of the folded green cardstock card.

Now grab your black ink pad or black craft paint. Have children make "fingerprints" all over, for the watermelon seeds inside the pink cardstock piece. Use the baby wipes for easy cleanup.

When done decorating the front, use your markers to write a clever message like "you are one in a melon" inside, to tie the theme together.

And that's it!!! Now give it away to the lucky receiver. Of course - repeat over and over again so everyone you know gets a handmade card today!