Lbt,
Kids are very energetic so they burn alot calories when they play, jump, run. So you need to supplement them with in between meals. But give selective snacks.
Read labels. As these days, there are alot trans fats in biscuits, cookies.
I am still baking home bread for family. So my kids will have a slice each with their kids cheese. Or sometime with jam. Normally early morning, elder one will have bread for breakfast and small one take porridge b4 goes to school. He does not drink milk in the morning.
Elder one will have one small bottle milk abt 6 oz. Then sit with us and have his breakfast one one slice of bread with either, jam, kaya, cheese or pork/fish floss, At times I also give nutella. Then he will finish a cup of organic soya milk before head to school.
I focus to give my boy food high in protein in the morning. This will enable his body to take longer to digest it so that there wont be any surge in sugar level. This keep him wide awake and not feeling legathic.
Back home for lunch. he will have his noodles with vege, fish slices or his fish porridge. Sometime he will ask for pork floss if he wants.
Before his nap, he will have a milk feed abt 8 oz. After nap, abt 2 hrs, he will have his afternoon snacks of some biscuits with milo.
Then by evening, he will have dinner with at abt 6 plus.
So if you see the pattern of his meal, it is basically abt 5 to 6 meal daily.
Kids needs all this to supplement their energy lost. If they burn more and intake remain same, naturally they will stagnant in growth. Or sometime, look skinnier.