Pretzels or Cheerios?
The better choice: Cheerios.
When packing the ubiquitous snack bag to toss to a kid in a car seat (or to quiet a screamer in a stroller), choose the O's. Not only are they fortified with vitamins and minerals, but a one-cup serving also contains six milligrams of iron, which is just shy of a kid's daily allowance. Iron is crucial for development of the brain and the nervous system. In addition, Cheerios are made with whole grains and little sugar―a rarity in a cereal (or a snack, for that matter).
Keep in mind: As snacks go, pretzels aren't bad. They're low in fat and calories. To increase their nutritional value, choose whole-wheat pretzels and low- or no-sodium varieties.