Another one pot meal.

This one is super easy. Get a bag of frozen vegetable (or fresh in the summer) and a can of tomato juice (I prefer getting the generic V8). Put both into a pot and warm to you're preferred temperature. In the summer we'll bring this up to a boil really fast so the vegetables cook then put it in the refrigerator to cool for a nice cold soup on hot days.
Super easy, and can be really inexpensive, our girls like making this cause they can make it on their own (with mom or dad standing nearby for the stove) . Then do the same as with the potato soup I listed earlier. Warm it up and have fun. Different things can spice it up for those with different tastes. Chili powder for one, cheese for another, bacon bits and sour cream, or something as simple as a little salt and pepper (my preference). Grill some cheese sandwiches put the soup in coffee cups and add a board game for a night to remember. Have left over chicken throw it in. Use this as a base and let your families taste buds rule the night.