Even simpler
Let's get straight to the point.
Everyone hates the system behind traditional money.
We pay to keep our money in banks. And inflation eats up whatever little "interest" the banks give us.
We needed an asset where we could hide our money away from all those problems.
Bitcoin is that asset.
Barbara is in the US. She wants to send money to her mom who just travelled to China but lost her wallet there.
Barbara tells her mom that it'll take about 10 days through Western Union to get the money to her.
Barbara's mom laughs. She tells her that with Bitcoin, it'd take approximately an hour.(Definitely not an hour when it first came out, but you work with what you got)
Barbara then initiates the sending process. She sends her mom 0.1BTC.
The miners use their spider sense to sense this new transaction trying to be added to the blockchain.(of course not. They use their super powered computers)
They all jump to the point of the transaction. Of course, only one miner is successful.(I explained what happens when they jump to the transaction point here.)
The miner who wins gets to put this new block into the chain of other blocks already mined.
Barbara's mom get her Bitcoin when the transaction is successfully verified by getting at least 3 confirmations from the blockchain.
Barbara's mom proceeds to spend her Bitcoin on some dumplings and noodle soup.(in an ideal world of course)
There you have it. That's bitcoin in a nutshell.
There are other extremely complex aspects of Bitcoin, but I won't touch those for the sake of beginners.
Thanks for reading!