Line two cookie sheets with parchment paper or silpat mats.
Take the mango, banana, and yogurt and add it to a blender. Blend until completely smooth.
Add the mixture to a plastic ziplock bag, and seal.
Snip off a tiny corner of the bag (just a tiny bit, the mixture comes out quickly!)
Pipe in small dots (or whatever shapes you desire) onto the parchment or silpat mats.
Place in the freezer for at least 2 hours to harden.
Once frozen, peel off the parchment or silpat and place in a container or ziplock bag and store in the freezer until ready to enjoy.