I am a mother of 3 children (7, 5 and 3), not to mention I have a husband who can eat. While most of you know, growing children can basically eat you out of house and home.
We live on a tight budget, so it's not like we can just buy fruits and veggies all the time at the grocery store (which are 3x more expensive). We go to a few local farmers markets. We went last weekend and spent $40. That would've cost us around $150 at the grocery store. We like to eat fruits and veggies a lot so what we do is this.
We buy as much as we possibly can at that time. Bring it home, clean it, cut it up and freeze it. It saves you money in the winter time when the farmers are not harvesting. So instead of paying $4.99 for a bag of carrots, you go to the freezer and there they are.
You can get really good deals with the farmers markets. We got watermelon for $1 as well as cantaloupe and carrots. They have things for everyone. As a treat for in the summer time, my kids will pull out frozen banana slices, watermelon, etc. It's a win, win for everyone in the house.