Best riddles with simple answers

What goes up when the rain comes down?

I’m at the beginning of the end and the start of eternity, at the end of time and space, in the middle of yesterday but nowhere in tomorrow. What am I?

Large as a mountain, small as a pea, Endlessly swimming in a waterless sea.

General Custer is surrounded by Indians and he's the only cowboy left. He finds an old lamp in front of him and rubs it. Out pops a genie. The genie grants Custer one wish, with a catch. He says, "Whatever you wish for, each Indian will get two of the same thing." Custer ponders a while and thinks:"If I get a bow and arrow they get two. If I get a rifle they get two!" He then rubs the bottle again and out pops the genie. "Well," the genie asks "have you made up your mind?" What did Custer ask for to help him get away?

What did the baseball glove say to the baseball?

Everyone in the world needs it. They generously give it. But never take it. Then what is it?

What is the shortest complete sentence in the English language?

What do you get when you cross a fly, a car, and a dog?

What does this say? Esgg sgeg gegs gsge.

I have just one, but with eight to spare, I am usually friendly, but I sometimes act like I don't care. What am I?