During you spare time, you can do beneficial things like a drawing session on how to draw the Leaning Tower of Pisa.
Draw the base of the tower having a circular shape. Add on another layer. Make sure that every time you add a layer, the size decreases. Next step is to illustrate a flag on the top most part of the tower. Sketch the silhouette of small buildings beside the tower. Highlight your drawing and use suitable colors.