Hi K.,
I'm a speech-language pathologist and a Mary Kay consultant so your message sparked an interest. I work with a lot of people with swallowing difficulties. People frequently recommend applesauce, however I encourage you to try pudding, mashed potatoes or something more cohesive. This will maintain it's form around the pill and your five year old will probably not even notice it is there. These textures should be smooth (requiring no chewing so they don't find the pill) without texture but slightly thicker than applesauce so they will not slide off the pill. Good luck! :)
Sincerely,
A.
PS: Ice cream sometimes works, but because it melts in your mouth due to the increase in body temperature it loses its form around the pill and the child then tastes the flavor of the pill.