Piaget’s stages of cognitive development explain how kids think and learn as they grow up. Here’s a simple look at when kids usually reach each stage:

1. Sensorimotor Stage (Birth to 2 years)

   • In this stage, babies explore the world using their senses, like seeing, hearing, and touching.
   • For example, a baby might shake a rattle to listen to the sound it makes.

2. Preoperational Stage (2 to 7 years)

   • Kids start to use words and begin to think in symbols during this time.
   • They might pretend a banana is a phone, showing how their imagination is growing.

3. Concrete Operational Stage (7 to 11 years)

   • Now, children begin to think logically about things they can see and touch.
   • They understand that pouring water from a tall glass to a short one means the amount of water stays the same.

4. Formal Operational Stage (12 years and up)

   • Teenagers start to think in more complex ways and can plan ahead.
   • For example, they might talk about "what if" situations or solve tough math problems.

Knowing these stages helps us see how children's thinking and learning grow over time!