Parents prodding picky children to eat healthier will try just about anything.

That’s partly because it’s so difficult to know which attempt will pay off. You might try the SnackerTracker, a simple scoreboard-style system intended to encourage children to track what they eat each day, with an emphasis on getting more produce, dairy and whole grains. The product (intended for ages 2 to 8) is a magnetic dry-erase board with boxes for checking off the correct number of servings from the various food groups.

The idea is that as children eat, they check off each serving.