Cut a small slice off the bottom of your watermelon so it will not roll around on you, making sure you don't cut to deep.
Using either a pairing knife or a pointed vegetable peeler cut out 1/4 of the watermelon for the opening of the carriage.
Using a spoon scoop out the flesh of the watermelon.
Cut up all of your fruit and place it in the opening of the carriage.
Place the lemon or for the baby's head. Using a sharpie marker draw the baby's face on the lemon.