This guide explores the world's tallest peaks in a way that's perfect for kids ages 8–12, with a fun fact about each one and a free printable worksheet to learn more.
The highest mountain of all
Mount Everest is the highest mountain on Earth. The air at its summit has only about a third as much oxygen as at sea level, so many climbers carry bottled oxygen to breathe.
The other giant peaks
K2 is the second-highest mountain — but it is far harder and more dangerous to climb than Everest.
Kangchenjunga is so respected that, out of tradition, climbers stop a few steps short of the very top.
Lhotse stands right next to Everest — its name means 'South Peak' in Tibetan.
Makalu has a clean pyramid shape that makes it a very tricky climb.
Why is it so hard to climb high mountains?
The higher you go, the colder it gets and the thinner the air becomes. Above a certain height — called the 'death zone' — there is so little oxygen that people cannot survive for long. Climbers train for years and move slowly to let their bodies adjust.
Almost all of the world's highest peaks are found in one mighty mountain range: the Himalayas in Asia.
Explore the world's highest mountains
All seven giant peaks are in our Highest Mountains activity book, with facts, word searches and an Explorer Certificate. Or start with a free worksheet.
A fun challenge: can you name the highest mountain on Earth — and the range most of the giants belong to?