The economy is like a big roller coaster that goes up and down. Sometimes people have lots of money to buy things, and sometimes they don't have as much money, and this changes over time in a pattern.
A maximum point is the highest spot on a hill where you can't go up anymore, only down. It's like the top of a slide where you stop climbing and start sliding down.
The economic cycle is like a roller coaster that goes up and down, showing how the economy gets better and worse over time. Sometimes people have lots of money to spend, and other times they don't have as much, and this affects jobs and prices.