In July, Clif Bar hosts the Clif Kid Game of the Year contest [3], which asks kiddies to get active by inventing backyard games. General Mills brand Nature Valley gives adults a similar nudge with its Trail View [4] website, where couch potatoes watch pedestrian-level views of hiking paths in our national parks (and hopefully get inspired to literally take a hike). But moseying around the backyard and virtual hiking don't exactly scream calorie burn--how long does it take these hardly active activities to burn off the health bars they're selling? We crunched the numbers.

120 calories in a Clif Kid Z Bar	190 calories in a Nature Valley bar
55 calories What a child burns in 30 minutes of backyard games	68 calories What an adult burns in 30 minutes of computer activity
66 minutes Time to burn a Clif Bar while participating in the Clif Bar contest	84 minutes Time to burn a Nature Valley bar while visiting the Trail View site