The teacher asked the students to bring one electrical appliance for

Show & Tell, and the next day every kid had something.

The teacher asks Wendy: What did you bring?

I brought a Walkman.

And what is it for?

You can listen to music with it!

Thats nice Wendy. What did you bring Kenny?

I brought a lectrical can opener, it opens cans!

Well done, Kenny.

Umm, Johnny, I see you didnt bring anything!

Yes, I did. Its in the hall.

So the entire class goes into the hallway.

Umm, Johnny, what is that?

Its a heart/lung machine hospitals use to keep your heart going.

Whoa. What did your father say about you bringing this?

He said, AAAARRRGGGH!!!