Add water, lemon juice, and sugar to a pitcher and stir until all the sugar is dissolved.
Add layers of kiwi, strawberries, and blueberries in popsicle molds and carefully pour prepared lemonade over the fruit, up to 1/2″ from the top of the mold.
Place the popsicle molds in the freezer for about 1 hour until popsicles are just starting to freeze, and insert a popsicle stick into the center of each mold.
Freeze for another 3-5 hours before serving. Dip the molds in room temperature water for 15-20 seconds to help remove the popsicles.