Question: While mixing sand, gravel, and cement for the foundation of a house, a worker noticed a small bird hopping along the top of the foundation wall. The bird misjudged a hop and fell down one of the holes between the blocks. The bird was down too far for anyone to reach it and the hole was too small for it to fly out of. Someone suggested using two sticks to reach down into the hole and pull the bird out, but this idea was rejected for fear it would injure the fragile bird. What would be the easiest way to get the bird out of
the hole without injuring it?
Answer: Since they had plenty of sand available, they could pour a little at a time into the hole. The bird would constantly keep shifting its position so that it stood on the rising sand.
Question: I've got your back, but I can let you down.
I can tell te truth, but I can also lie.
I can be nice, but also mean.
I can make you laugh, but I can make you cry.
I can stay the same,but I can change.
What am I?