I go up and down at the same time. Up towards to sky and down towards the ground. What am I?

Answer: See-saw

More What am I ? with answers

More What am I ?

I go up and down the stairs without moving. What am I?
I go up and I go down, sometimes I am curvy and sometimes I am straight. What am I?
I go up and I go down, towards the sky and the ground. I’m present and past tense too, Let’s go for a ride, me and you. What am I?
I go up and never come down no matter how hard you wish. As I get higher, more wrinkles crawl on to the face. What am I?
I go up when the rain comes down. What am I?
I grown from darkness but shine with a pale light. Very round I am, and always a lady's delight. What am I?
I gurgle but never speak, run but never walk, have a bed but never sleep. What am I?
I hate the sun and dislike the moon, give me light and I will run. What am I?
I have 24 keys but cannot open any locks. Sometimes loud, sometimes soft. What am I?
I have 4 legs but never run. What am I?
I have a bed, but I do not sleep. I have a mouth, but I don't eat. You hear me whisper, but I never talk. You can see me run, I never walk. What am I?
I have a birthplace but was never born. I have a mouth but can't speak and I run but have no legs. What am I?