Answer:
Other terms for this handy device include doohicky, doo-dad, and whatchyamacallit.
What falls down but is never injured?
What is in the middle of nowhere?
A blue house has blue bricks; a yellow house has a yellow bricks. What is a green house made of?
Usually green but can be brown. It's a great place to play or lie down. What is it?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?