Place the pita bread on a cutting board and using a big heart-shaped cookie cutter (or any other shape you want), cut out a couple of heart shapes for the pizza crust. Add to a lunchbox.
Spoon the pizza sauce into a leak-proof container. Add the cheese to a separate leak-proof container. Add containers to a lunchbox.
Place the slices of pepperoni on a cutting board and using a small heart-shaped cutter, cut out some pieces. Add pepperoni hearts to a lunchbox.
Place the watermelon slice on the cutting board and cut with the small heart-shaped cutter into 4 pieces. Taking a lollipop stick, thread grapes down the middle of the stick and finish it off with hearts on both sides. Place the spears in a lunchbox.
Finally, add in a couple of small dye-free candy or chocolate to the lunchbox for an extra special treat.