Burger Shack is a fast food place that mostly serves burgers, Chili Fries and other associated food items, craved by both Ben and Albedo.
Ben, Gwen and Kevin often used to go there for a bite to eat when they weren't hanging out at Mr. Smoothy's.
Kiddy meals can be given to children 8 and under, as shown in Ghost Town, when Ben gave Vilgax a children's meal and said, "I got you the kiddy meal, so don't let them know you're over 8."
Apparently, the franchise is popular among alien races, as the Lewodans and Appoplexians both agreed to order takeout in Food Around the Corner.