Mixing bowl, spoon, whatever you're cooking for dinner
If you're trying to cook and your little one keeps demanding your attention, give them their own large mixing bowl and spoon. Hand them the odds and ends of whatever you're using: i.e. potato or onion peels, celery leaves, pasta, etc. Add water and any spices you feel you can spare. Stir, stir, stir... let your child keep adding whatever strikes their fancy. Et voila! Special Soup! You can't eat it, but your child will have fun working along next to you.