← Back to course
Everyday Machines / Week 10 / Wednesday
3/6
Week 10 · Springs and Click Pens

Wednesday

Take apart a click pen
// A spring pushes back
⏱ about 15 min

Wednesday: Take Apart a Click Pen

Rocket grabs a pen and starts to twist it. "Wait!" says Raven.

"First we ask a grown-up which pen is okay."

Rocket slows down. A grown-up hands them an old pen.

Nova glows. "Would you like a hint? Lay each part in a row."

Pick the right pen

Use an old click pen a grown-up says is okay.

The best pens twist apart into two barrels.

Then the inside parts slide right out.

You do not need to break anything.

What you need

  • One old click pen a grown-up approved
  • A cup for the small parts
  • A tray or a towel to work on
  • Paper and a pencil
Safety first
A grown-up approves the pen first. Never use a new pen.
Keep the spring and small parts away from younger siblings.
Small parts never go near a mouth.
Every part goes in the cup or back in the pen.
  1. Set the pen on the tray.
  2. Twist the two barrels apart.
  3. Tip the inside parts gently onto the tray.
  4. Lay the parts in a row.
  5. Find the spring. Squeeze it gently.
  6. Find the ink tube. Look at its tip.
  7. Put every part in the cup when you are done.

The parts you found

PartWhat it is
BarrelThe long tube that holds the parts
Ink tubeThe thin tube with the writing tip
SpringThe coil that pushes the ink tube
ButtonThe part you click
TAKE-APART CHECK
  • Read the question.
  • Tap your answer.
Who picks the pen for the take-apart?
Where do the small parts go when you finish?
Which part is the coil?
SentenceTrue or false?
Rocket should twist any pen he finds.?
Small parts stay away from younger siblings.?
The ink tube has the writing tip.?
It is okay to put a spring in your mouth.?
WHY THIS EXERCISESafe take-aparts use an approved pen and keep small parts safe.
TAKE-APART ORDER
  • Tap a card.
  • Then tap its spot.
1First
2Next
3Then
4Last
Draw every pen part in a row. Label the spring.
PARTS CHECK
  • Read the question.
  • Tap your answer.
Which part has the writing tip?
Which part holds all the other parts?
Why did Rocket slow down in the story?

You took a pen apart safely. Nice work!

Tomorrow, we test the spring and put the pen back together.

← Tuesday