8-10 months

Cause and effect becomes fascinating

Dropping, banging and repeating tests how the world responds

The Millie's Team By The Millie's Team · Parenting Notes

Around week thirty-six, your baby is becoming a little scientist. Dropping things, banging objects and repeating actions are all ways of testing what happens next.

What is happening

Your baby is learning that their actions cause reactions. A spoon that falls always falls, a toy that squeaks always squeaks. These small experiments help them build a clearer picture of how the world works.

Is this normal

Yes. Repetitive testing of cause and effect is a healthy sign of cognitive development. It can sometimes feel tiring, especially when picking things up off the floor for the tenth time, but it is real learning.

What you may notice

What helps right now

What to expect next

Over the next few weeks, this testing usually becomes more inventive. Your baby may start trying different ways to make the same thing happen, which is a step toward problem-solving.