Roll lemons on countertop, cut in half, and juice. Strain out seeds to get 1 cup fresh juice. In large pitcher, combine lemon juice, ½ cup sugar, and 4 cups water. Stir vigorously 60 seconds until sugar dissolves completely. Add 1 cup cotton candy syrup and stir gently until color distributes evenly throughout lemonade. Fill glasses with ice cubes and pour lemonade, leaving 1 inch space at top. Place cotton candy tuft on rim just before serving. Watch it dissolve into colorful swirls for 20-30 seconds. For Homemade Cotton Candy Syrup: Combine 1 cup sugar + 1 cup water over medium heat until dissolved. Cool, then add 1 tsp vanilla extract, 1 tsp raspberry extract, and food coloring.