Q.  What do you get if you crossed a canary with a carrier pigeon?
A.  A singing telegram.

Q.  What would you get if you cross a clock with a cigarette?
A.  Second hand smoke.

Q.  Why did the office workers move the calendar away from the window?
A.  Because it was a leap year.

Q.  How do you clear ice off the windows of tall buildings?
A.  Use a sky scraper.

Q.  What did the tie say to the hat?
A.  You go on ahead. I'll hang around for awhile.

Q.  What's big, has a trunk, and is blue all over?
A.  An elephant holding his breath.

Q.  What do you get when you cross a rocket ship with a potato?
A.  A spudnik.

Q.  How do you get an astronaut's baby to fall asleep?
A.  Rocket.

Q.  Why was the math book so sad.
A.  It had too many problems.

Q.  Why did the teacher wear sunglasses to class?
A.  Because the students were so bright