Here is a lesson on Gadgets that I did with Grade 1 High School students. The listening part was a bit hard sometimes, but they stayed with it those little angels did.
They all know what gadget means for the most part, because they all know about the Inspector Gadget movie. Though they might confuse the meaning of "gadget" with "inspector."
It starts with a powerpoint explanation of gadgets. Then goes into a listening activity from
http://www.elllo.org/english/Mixers/T084-Gadget.htm with a fill in the blanks worksheet and quiz. (I had to read Shalini over again myself because she talks so fast.)
Go over the answers and meanings, and do the quiz.
A review and the last two slides can be made into part 2 for the next period if you want.
Enjoy!
"Call Me, Touch Me, With Me, Everybody"
Huh Kyung Young