It’s often cheaper to make food at home than to purchase it in a store. If you’re raising your children vegan, here’s some helpful articles that offer recipes for making wholesome baby food, as well as preparing healthy fast food for pre-schoolers and lunch box items for kids. See:
https://www.vrg.org/recipes/babyfood.htm
https://www.vrg.org/recipes/schoolers.htm#sauce
https://www.vrg.org/journal/vj2007issue4/2007_issue4_pb_j.php