If you say my name, I will disappear, what am I?
Shhhh

What can go up a chimney down but can't go down a chimney up?
If you say my name, I will disappear, what am I?
Shhhh
What can go up a chimney down but can't go down a chimney up?
I think the problem with riddles these days is the fact all the good ones are so old everyone knows them so they stop being riddles and turn into games of "how good it your memory".
Driving along at night you appear at a fork in the road. You know that one way leads to a cliff edge and certain death, whilst the other leads to your destination.
Two twins are stood at the fork in the road, one can only tell the truth, whilst the other can only tell lies, yet you don't know which is which. You are only allowed one question which you can ask to both of them in an attempt to find out which road is the safe one.
What is the question that you ask to get to your destination safely?
(No you can't turn around, you just CAN'T.)
How do you stop a dog from barking in July?
Someone get David Bowie!
The answer is ask one twin what the other would said if asked "Which road is safe?", and pick the other one.