Just a quick list:
Started with 4~5 drops of apple or grape juice daily since you were 3.5 months.
Started rice cereal (mixed with formula) 10 ml +10 ml daily when you were four months and a week.
After 2 days mixed rice cereal with fresh fruit juice (apple or grapes) rather than formula. To make it smooth and warm, I added less than 5 ml of hot water.
After a couple of weeks I smashed a little piece of banana, mixed it with formula and gave it to you. You love this smooth tasty snack.
Then a mix of avocado and rice cereal for a couple of days.
Then a mix of banana and oatmeal cereal for a couple of days.
Now a mix of fresh apple juice and oatmeal cereal for a couple of days.
In a day or two, I am planning to give you almond syrup with oatmeal cereal. I just hope you are not allergic to almond.