Wholegrain and quick oats: reading the names
One term describes the grain; the other describes preparation. Here is how to choose for your recipe.
Oats

Two different descriptions
Wholegrain refers to the parts of the grain retained in the oats. Quick refers to processing that helps oats cook sooner. The words are not opposites: quick oats can also be wholegrain. Check the ingredients on the actual pack rather than assuming that a preparation name tells you everything about the product.
Think about the result you want
Old-fashioned rolled oats are flattened whole oats. Quick oats are cut into smaller pieces to cook faster. The size of the pieces can change the texture of a bowl or a bake, so use the type named in your recipe when you can. This is a general distinction between oat forms, not a description of every Kiddo product.
Let the pack guide preparation
Use your product’s liquid amounts, cooking instructions and storage guidance. If a recipe calls for a different oat type, check its substitution notes before swapping. For a Kiddo jar, consult its own label; instructions for plain oats should not automatically be applied to a flavored product.