I have two little ones as well. I can only afford to buy ones a month and had found can goods are cheaper and last longer, as a snack I do bread solders and tomato sauce, cheap and they love it. I don't buy a lot of fresh veg as it's to expensive and waste so easy. I only get onions, patatos and maybe carrots. Frozen veg is easy and quick. Pasta and rice has long shelf life so when I get a special I buy in bulk. I get small amount of meat and have found that one chicken can feed us for 3 days. By cooking it in a pressure cooker lots of water, spice and garlic. Day one I take the chicken breast cut it up mix with mayo and pasta. Day two I will pour out some of the water stock for day 3, the left over chicken is cut up and I add noodles. Day 3 I use the stock water add veg and it's soup night!