In a bowl, combine sliced strawberries and sugar. Let sit for 10-15 minutes to allow strawberries to expel juice.
In a food processor (or blender), combine strawberry-sugar mixture, lemon juice and lemon zest. Process until smooth.
Pour strawberry puree into molds with wooden sticks and place in freezer.
Freeze for at least 3 hours until popsicle is solid. To remove popsicles from mold, submerge mold into room temperature or slightly warm water for a couple of minutes. Remove from water and pull popsicles out.
* If using kiwis, place a couple of sliced kiwis up against the inside of the mold. The kiwi should adhere to the sides. Then pour strawberry puree and freeze.
* If adding carrot-orange juice, add after filling mold halfway with strawberry puree. Then freeze as normal.