Set up a still life of some items that make you happy. It could be a combo of a favorite book, food, souvenir, plant, or whatever you think would be fun to draw. To make shading easier, you can use a desk light to light it from one side to create distinct shadows. Use the medium (or multi-media) of your choice.
Here are examples of three levels of still lifes done with graphite pencils.
ART APPRECIATION ASSIGNMENT:
Enjoy this short video of a 12-year-old art prodigy!