Okay kiddo, let me explain it to you in a way you'll understand.
David Bowie, who was a famous musician, also had a big collection of paintings, sculptures, and other artworks. He liked to collect art from different artists and keep them in his home.
Imagine you have a box of different toys, just like David Bowie had a collection of different artworks. He liked these artworks a lot and enjoyed looking at them every day.
Sometimes David would even share his art collection with other people who wanted to see it. Just like if you had a really cool toy, you might want to show it to your friends and family.
But when David Bowie passed away, he couldn't keep his art collection anymore. So, he decided to sell it to other people who would appreciate it just as much as he did.
And that's what happened to David Bowie's art collection; it was sold to other people so they could enjoy it as much as he did when he was alive.