Step 2: Froggie Feet
Go get it.
Now here are your options, get your melon baller and get to work, carve out the melon with your knife... OR EAT IT.
I suggest that last option.
Now you should have a nice piece of watermelon rind, ready to be carved into froggie feet.
Cut the rind in half so you have two triangles, score some happy little webbed toes in the surface then very carefully carve them out.
Now take your little froggie head and your little froggie feet and set them on your platter.