When our little one reached 6 months and we went to see her pediatrician, we talked about the foods that we can start with. She told us we can start with vegetables, fruits and yogurt. So when I came home I called my mom who is an expert on homemade yogurt. Because I think yogurt is a great food for babies also for adults.
The method is very basic, you don't need special yogurt cultures or any incubating equipment.
All you need to make homemade yogurt is milk and any kind of plain yogurt. You can use skim milk if you like, but whole or 2% fat milk will make the thickest yogurt.
When I make yogurt I am using a gallon of 2% fat milk, for the culture we bought a probiotic plain yogurt, after starting with that yogurt we continue to make yogurt with our own yogurt.