Soften the veggies: Warm the olive oil in a large pot over medium heat.
Add onion, carrots, and celery. Cook 5–7 minutes, stirring, until the veggies are soft and fragrant. Add garlic and cook 30 seconds more.
Add broth and season: Pour in the chicken broth.
Add bay leaf and thyme. Bring to a gentle simmer. Keep it at a light bubble—not a rolling boil—to preserve flavor and keep the soup clear.
Cook the pasta: Stir in the small pasta.
Simmer according to package directions, usually 6–10 minutes, until tender. For toddlers, you can cook it 1–2 minutes longer for extra softness.
Add chicken: Stir in the shredded chicken and simmer 2–3 minutes, just to warm through. Remove the bay leaf.
Season lightly: Taste and add salt and pepper, keeping it mild.
For brightness, add a small squeeze of lemon juice. Stir in parsley if using.
Adjust texture: Noodles soak up broth as they sit. Add a splash of water or extra broth to keep it soupy.
For very young toddlers, mash a bit of the veggies with the back of a spoon for a smoother spoonful.
Cool and serve: Let the soup cool to a safe temperature. Serve in a shallow bowl with a toddler spoon. You can cut noodles smaller if needed.