Depending on his or her age, your child may use a hand-held device to measure how well he or she can breathe (peak flow meter).

CNN: Childhood asthma

In a few minutes Lorelei brought out the peak flow meter, and when Davis blew into it he was back nearly to his normal reading of 380.

NPR: In 'Challenger Park,' Mom Is an Astronaut

He was too late to apply for a permit to climb that year, government officials said he could not climb Everest if he hadn't climbed a 6, 000-meter peak and insurance companies originally said they would not cover him.

CNN: Oldest Everest climber finally gets recognition

It includes a 10- meter waterfall, a 20-meter climbing peak, an indoor rain room for testing waterproof jackets and some precious plaques over split-log benches.

FORBES: Backpackers meet the bottom line

Healy and Brewster dream of people someday driving a fuel-cell car up to an Enernoc meter during peak demand and pumping electricity back into the grid.

FORBES: OutFront

Its prime target is the 18, 000-foot (5, 500-meter) peak at the center of Gale Crater, Mount Sharp, where scientists hope to get a layer-by-layer look at the history of the planet.

CNN: Mars rover captures nearby rocket 'footprint'

The rover's mission is to determine whether Mars ever had an environment capable of supporting life, and its prime target is Mount Sharp, the 18, 000-foot (5, 500-meter) peak about 12 kilometers (7.5 miles) to the south.

CNN: Mars panorama shows Curiosity's prime target

By communicating with a smart meter, Nucleus will let people program appliances to take advantage of off-peak pricing plans offered by utilities that have time-of-use electricity plans.

FORBES: Get yourself connected: GE at CES 2011