Gather your supplies and preheat the oven to 400 degrees.
Poke holes in and place potatoes directly on rack to bake for 45 minutes. Add a lined cookie sheet underneath to catch sugars.
Split the skins with a knife and they'll fall right off.
Cube two of the potatoes and place in the plastic canister that comes with the hand blender. Add about 1/4 cup of water.
Blend until smooth. No chunks!!
Scoop into clean ice cube tray.
Cover the tray with a lid if you have one or two layers of plastic wrap. Place in freezer. Use within two to three weeks.
For the avocado/mango mixture use 2 avocados and 1/2 the bag of mangos at a time. The silver tool is an avocado cutter from Crate&Barrel that I highly recommend. No mess!
Blend avocados and mango chunks till smooth.
Scoop into trays, cover, and freeze. At 6 months my daughter ate 2 warmed cubes at a feeding. Now at 9 months she has three.