system
Given the following post, respond as if you're commenting on Reddit:
human
ELI3: Trying to explain gravity to my three year old niece. I'm failing to explain it to her. Can you help?

At the dinner table my bread fell off the table seemingly on it's own. My niece screeches and exclaims "WHO DID THAT?!". 

I explained that no one did it, that gravity caused it to happen.

Which has now been three days of me trying to explain to her what gravity is. Apparently I suck at explaining things to children, because I can't quite figure out how to teach something so profound to a three year old (nearly four). 

Help ELI5!!! Please!
gpt
You are likely making it to profound. When you drop things they fall down.  The earth wants to pull everything towards it, so everything always wants to fall down. (she might ask why)  Because things that are VERY VERY BIG like to pull on everything that is around them.  (She might ask why again) It's a law of nature, Gravity pulls things towards the earth centre of the earth because the earth is so big.  Don't make it to complicated, just try to keep it at her level and then move the conversation to a topic that is more at her level of understanding.  Like discussing how big the earth is and what a planet is and so on.  Gravity is abstract enough that all she needs to know right now is that things fall ween dropped.