The Fast Food Song is fun for Scouts. It is an action song and would fit in well with a nutrition themed meeting.
Tiger Adventure: Tiger Bites
Tiger Bites is one of the Tiger CORE Adventure Requirements. For this adventure, Tiger Cubs and their adult partners learn about nutritious food choices, participate in mealtime chores, practice good manners and hygiene, and make a snack.
Printable helps for requirements:
Most Scouts are probably familiar with the food pyramid from school. To make the nutrition and fitness components of the Scout program more interesting, turn them into a hands-on activity.
This is basically a go fish game with different types of food. I liked how the kids talked about the different types of food they saw on the cards.