Answer:
What has been around for millions of years but is never more than a month old?
What goes up and down the stairs without moving?
I'm the son of water but when I return to water I die. Who am I?
Other terms for this handy device include doohicky, doo-dad, and whatchyamacallit.
Come up and we go, Go down and we stay.
I am a room that has a roof but no walls. What am I?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?