Combine water and sugar in a small saucepan. Cook over medium-high heat, stirring, just until boiling and sugar is completely dissolved. Cool for at least 30 minutes.
Purée watermelon in blender. Strain mixture through a fine mesh. Add 1/3 cup simple syrup. Makes about 1-1/2 cups of smooth watermelon purée.
YOGURT: Blend yogurt, honey and 1/2 cup simple syrup until smooth.
Assemble: Fill molds 1/3 full with yogurt mixture. Freeze for
minutes. Add watermelon mixture to 2/3 full. Fill to top with
remaining yougurt mixture (You can leave in layers or swirl a bit with a stick). Freeze for 45 minutes. Insert wooden popsicle sticks and continue to freeze until solid, 3-4 hours or up to 2 weeks.
Makes about 8-10 ice-pops depending on the size of molds.
TIP: You can just fill some of the molds completely with watermelon purée - delicious and simple!