Free lunches, and in some locations breakfast and even dinner, are available FREE to ANY child 18 and under throughout the United States. Check out the website below to find a location near you.
In our state, most elementary schools and large city parks distribute lunches Monday through Friday. The below website is good, but many places are probably missing as even our small community has a nonprofit organization, in addition to the government funded summer lunch programs, who also offer free meals for anyone Monday-Friday.
Please know that if you are struggling financially or physically there are places, especially in the summer, to get food. Please do not be embarrassed to reach out for help.
If you are looking for some free activities (cheap) for your kids, you may find something in this post.