Meat thermometers can be awkward to use in terms of placement and avoidance of bones. Because of these problems, each year 30 million Thanksgiving turkeys have a built-in thermometer that pops up when the turkey is properly cooked. Turkey timers are an example of how engineering solved a common, everyday problem. The following 5E learning cycle activity, as with all of the activities in the Everyday Engineering series, integrates this engineering concept with science content, in this case, to investigate the development of the disposable pop-up cooking thermometer. (Contains 5 figures.)