Welcome, moms and pops of the internet. Kids are expensive. When they're babies, it feels like every penny goes towards diapers, babysitters, and food. As they grow, they start needing more and more food (while also getting pickier and picker). They start growing rapidly, necessitating a constant flow of new shoes and clothes that will fit them comfortably. Then, money goes into school, school supplies, hobbies, toys, trips, extracurricular activities, and now in the 2020s, subscriptions to Net…