Blend each fruit with a little bit of water with blender until smooth, then mix it with powder sugar. Set aside.
Mix yogurt with powder sugar until evenly distributed.
Carefully pour one tablespoon for each color according to the color of rainbow and one tablespoon yogurt in between every color into the popsicle mold.
To make the gradation look natural, carefully slide popsicle stick from the side from top to bottom then slide it slightly to the side then pull up.
Place popsicle stick in the center.
Freeze popsicle for 6 hours or overnight.
To take out the popsicle from the mold, keep at room temperature for a few minutes.
Enjoy. May your summer be refreshing!