Answer:
Hearing something unexpected or touching a live wire can have this effect.
Tickle with your fingers and a song it will sing. Be careful, though, you may break a string. What is it?
When a doctor hits you with a hammer he is testing this
Where can you find roads without cars, forests without trees and cities without houses?
Other terms for this handy device include doohicky, doo-dad, and whatchyamacallit.
How did the farmer find his wife?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?