Human lifespan development — infancy, childhood, adolescence

What you'll learn

1. 1

   Imagine a baby learning to hold a rattle — that's infancy! Then a kid learning to ride a bike — childhood! Then a teen growing taller and changing — adolescence!

2. 2

   Which stage comes first in human development?

3. 3

   Here's a timeline of the three stages: infancy (0-2 years), childhood (2-12 years), adolescence (12-18 years).

4. 4

   Let's look at physical changes in each stage. For example, a baby learns to crawl, a child learns to skip, and a teen's voice may deepen.

5. 5

   Drag each change to the correct stage: 'Learning to talk' → Infancy, 'Starting school' → Childhood, 'Voice breaking' → Adolescence.

6. 6

   Which stage usually includes starting primary school?

7. 7

   What is a key physical change during adolescence?