Pentimento is like when you draw a picture on paper and then trace over it with a different color. Sometimes the first picture still shows a little bit through the new one. It's like you can see two pictures at the same time!
In art, pentimento is kind of the same thing. When artists create a painting, they might change their minds about something and paint over it. But sometimes, you can still see a little bit of the old painting peeking through the new one. It's like a ghost of the old painting is still there!
This can happen over time, too. As paintings get older and the paint starts to fade or wear away, you might be able to see the old painting underneath. It's like a secret message from the past!
So, pentimento is when you can see a little bit of an old picture or painting underneath a new one. It's kind of like looking back in time, and it's pretty cool!