Many kinds of baby food can be made according to baby growing stage.
Breastfeeding stage (5-6 months) - Step 1 plate : To mash food into smooth puree.
Learning to swallow (7-8 months) - Step 2 plate: To grate food into small pieces. Both sides of plate can be used.
Learning to mumble (9-11 months) - Step 3 plate: To mince food into shreds. Both sides of plate can be used.
Leaning to chew (5 months onwards) - Mash bowl: To make mashed food.