How it works
Maya had a piggy bank for a few coins, close by. One day it was nearly full, with six coins and no more room.
A village bank keeps lots of coins safe. The banker writes Maya's name and her coins in a big book, and the coins go into the vault.
The coins are still Maya's. She can ask for them back on any day the bank is open.
Both are good, because each does a different job.