Elevator
The answer to the riddle "What goes up but never goes down but remains in the same place" is your age. As time progresses, your age increases, but you cannot reverse it or decrease it, and you remain in the same position in the passage of time.
your age
What goes up when rain comes down is an umbrella.
Heat goes up when rain comes down. This is a kid joke.
It comes and goes every 2 years.
age
rain
your age
age
your age
Your age.
rain goes down, but never goes up actually it evaporates is transformed to water vapor goes into the clouds and eventually comes down as rain again (pixilated)