Week 10 · Friday: Springs and Click Pens (Everyday Machines)

Friday: Explain the Click Pen

Rocket clicks the pen he rebuilt. Click! The tip comes out.

"I know what is happening inside now," he grins.

Raven asks, "What do you notice first when you press?"

Nova glows a cutaway. "Would you like a hint? Start with the button."

You press the button.

The button pushes the ink tube down.

The spring gets squeezed.

The tip comes out, and you can write.

Click again, and the spring pushes the ink tube back up.

CLICK PEN STEPS

1First

2Next

3Then

4Last

Without the spring, the tip could not go back up.

The spring stores your push.

Then it gives the push back.

That is why a click pen needs a spring.

EXPLAIN IT

What part do you press first?

What pushes the ink tube back up?

What happens to the spring when the tip comes out?

Draw a cutaway of a click pen. Show the spring squeezed.

Try it

Tell a grown-up how a click pen works.
Use the words button, ink tube and spring.
Click a pen slowly while you explain.

Safety first

Point the pen tip at the table while you click.
Small parts stay in the cup or in the pen.

Sentence	True or false?
The spring pushes the ink tube back up.	?
A click pen works fine without its spring.	?
The spring stores your push and gives it back.	?
You press the spring with your thumb.	?

WHY THIS EXERCISEThe spring stores a push, so the tip can come back.

Next week, we look at a bigger machine: a car.

We find out what turns the wheels.

We learn what seat belts do.

SPRING WEEK CHECK

A squeezed spring pushes toward what?

Which part did we measure on Thursday?

Where do small pen parts go when you finish?

Which pen part surprised you most this week?What would you tell a friend about springs?

You explained a machine from the inside. Fantastic!

Tomorrow is Machine Day: a spring hunt!