Add the chopped watermelon, lime juice and agave to a blender or a bowl if using an immersion blender. Blend until a smooth puree. Taste for sweetness and stir in the chia seeds, then using a liquid measuring cup, carefully pour about a quarter of a cup of the puree into each popsicle mold. Place in the freezer.

While the watermelon layer sets, in a small bowl, stir together the yogurt, cold water, fresh lime juice and agave until smooth. The mixture should be thin enough to pour or drizzle but not completely liquid. Chill until ready to use.

After the popsicles have been in the freezer an hour or a little more (depending on your freezer,) once the tops are hard enough for the next layer not to seep through, carefully add about a tablespoon and a half of the yogurt on top of the watermelon layer. I do this very gently with a spoon or pour the mixture into a zip-top sandwich bag, snip off a tiny corner and gently squeeze into each pop for more precision. (Try not to spill it on the sides or the stick or just wipe off if you do.) Set the popsicles back in the freezer

While the yogurt layer sets, add the chopped, semi-peeled cucumber, the mint, lime juice and agave to a blender or use an immersion blender in a tall cup to blend until smooth. Taste for sweetness and adjust as needed. Chill in the refrigerator.

After the yogurt layer has been in the freezer an hour or a little more (again depending on your freezer,) once the tops are hard enough for the next layer not to seep through, carefully add about 2 tablespoons of the cucumber mixture on top of the yogurt layer using the spoon or plastic baggie method. Set back in the freezer.

Once the popsicles have had about an hour to freeze, place the lid on the popsicle maker and insert the popsicle sticks about 2/3 the way down. (I like to freeze them a little before this step so they don't sink all the way down.) Freeze for about another 3 hours or more until completely set.

To unmold, I find it's easiest to dip the popsicle mold in a bowl of warm water for a few seconds then they should pop out. Enjoy right away or place in a freezer-safe container for later.