Seriously, take the cereals that you give your kids, and read the ingredient list, you will be shocked. The second ingredient in the list is usually sugar, and the third is often palm oil.
The chocolate-like cereals are usually made of corn flour and not whole grains, which is even worst.
Here is a very tasty breakfast that is very healthy, and easy to prepare, I eat it every day.
Just take two tablespoons of rolled oats (not a lot of oats), and add frozen red fruits. Frozen fruits retain the majority of their nutrition, and are found everywhere and are very convenient.
Blueberries, raspberries, etc. take a cup, cover with plant milk and a tablespoon of ground flack seeds. Mix and microwave for 1.5 to 2 minutes.
Just to cut the red fruits potential acidity and to make it more fun, you might want to add a teaspoon of jam, not more.
Take 1 banana, mash half and slice the other half. Mix the mashed half and put the slices on top.
You won't be hungry until lunchtime, enjoy!