This is basically bacon soup. Our three-year-old loves soup and I threw this one together just for her:
Render lots of diced bacon. Add diced onion and carrot and sweat until onion is tender. Add some chopped garlic, stir, and then add diced potatoes and water.
Simmer until potatoes are almost tender, then add some drained and rinsed canned beans. (You've been seasoning at every step, right?) Simmer for 5 more minutes, then add frozen peas. Cook 2 minutes until the peas are tender.
Serve with Parmesan cheese, and get your dad to blow on every bite.