In a medium saucepan, combine 1.5 cups of water with granulated white sugar. Heat over medium-high temperature, stirring constantly until the mixture comes to a boil and the sugar completely dissolves. This should take about 5 minutes. Remove from heat and let it cool to room temperature.

In a large pitcher, pour in the cooled simple syrup, followed by 1.5 cups of freshly squeezed lemon juice. Add in the remaining 7.5 cups of water. Stir gently to combine.

Divide the remaining water into three bowls. Add pink food coloring to one bowl, purple to another, and teal to the last. Pour colored water into ice cube trays and freeze for at least 4 hours.

Dip the rims of the glasses into corn syrup, then roll in sprinkles to coat.

Fill each glass with colorful ice cubes, then pour the prepared lemonade over the ice. Serve immediately.