Which of the following is a side option for Kids Grilled Cheese?

The side options for the Kids Grilled Cheese at Yard House include fries or a small house salad. This combination aligns well with the typical offerings for children's meals, which often feature simpler, more universally liked options that appeal to younger diners. Fries are a classic choice that many kids enjoy, while a small house salad provides a healthier alternative. This balance allows parents to make a decision that caters to their child's preferences while also providing an option to include a nutritious element in their meal.

Other alternatives presented in the question are not typically associated with a kids' menu, as they may not appeal to the younger demographic. Optioned sides can often be less appealing if they involve more complex flavors or ingredients that might not be as accepted by children.