These healthy breakfasts are easy to make, can be made quickly, cheaply, and are great for cooking with kids.
Steel-cut oatmeal: https://www.traderjoes.com/fearless-flyer/article/4050
Protein pancake mix: https://www.costco.com/Kodiak-Cakes-Flapjack-%2526-Waffle-Mix-4.5-lbs%2C-2-pack.product.100370329.html