You may want to look around the house and see if you have some of your artwork already done and ready to be displayed, or you might want to make something new. A drawing, painting, even a sculpture.
Your LEGO creation may be a traditional picture frame, or it might be something quite elaborate and unexpected.
You might want to make a plinth to showcase a sculpture you've made.
Here you can see what other kids from around the world created for this challenge.