Hi! Here are three easy ways to say the same idea for a 7-year-old:
Bears run faster than humans and climb trees skillfully.
- Bears can run faster than people and are good at climbing trees.
This uses simple words like "people" and "good at climbing." - Bears run quicker than humans and climb trees very well.
"Quicker" and "very well" say the same thing in a kid-friendly way. - Compared to people, bears run faster and are really good at climbing trees.
Starting with "Compared to people" shows the difference clearly.
Pick the one you like best when you speak or write!