I Go Up I Go Down I'm The Present I'm The Past Riddle

Riddle: I go up, I go down;I'm the present, I'm the past;My purpose is none other than for my kids to have fun.What am I?

Answer: A See-Saw.

Source: https://www.riddles.com/index.php/2053

I go up, I go down;I'm the present, I'm the past;My purpose is none other than for my <a title="Riddles For Kids" href="https://www.riddles.com/riddles-for-kids">kids to have fun</a>.What am I? — I go up I go down I'm the present I'm the past riddle by Morgan Foster Riddle