
When people climb tall mountains, they bring oxygen. They carry it in tanks. It helps them breathe. It helps them reach the top!
What Do You Think? Would you try mountain climbing? Why or why not?
Photo Credit: Rapt.Tv/Alamy Stock Photo
You can magnify things that are far away too. You … read more
The Sun/Moon pattern repeats every day. When the Sun comes … read more
Robots can also be fun! These children are flying a … read more
© 2026 McGraw-Hill Education. All Rights Reserved.