Now I know there are many different theories on breakfast and which is the healthiest and when to eat it etc. For me I hark back to my Grandmothers and reckon kids need something to "stick to their ribs" in the morning. After a night of not eating it's time to "break-the-fast" with something filling and hearty. Max loves his porridge. I make it with wholegrain oats (that I blitz a little and then soak), mixed with oat bran (for added fibre), some raisins for sweetness, a cinnamon stick for taste and home-made raw milk kefir for gut health. Joe has home-made muesli followed by a bowl of porridge (the kid eats enough for all of us ...). This keeps them going until lunch when they are once again "starving" and ready to slam the next meal.
For me personally I find having a nutrient dense breakfast sets me up for a day of eating well and tamps down my "snacking gene".
Are you a breakfast or not person?