Pour the watermelon schnapps into a collins glass. Fill halfway with ice. Stand up a gold foil covered chocolate coin in ice against the contour of the glass. Fill rest of glass with ice.
Now that the schnapps has chilled, tilt the glass and gently pour in the tequila. Cut up a lemon and squeeze the juice of two wedges into the tequila, and carefully bring the drink to about an ounce and a half from full with 7-Up or Sprite. Float the Midori on the top.