This was one of my favorite assignments. I would buy some shiny Christmas ornaments each year. Then, I would ask students to draw their own reflection in the sphere. Here, I lay out step by step how to draw your image in the sphere. Often after this presentation, I would let students do a line drawing, then they would have to number their values as they see from a chart they created. Then, they would lay in values to match their chart.
*A small number of photographs in this slide show are not mine. I am not claiming them as such. The rest of the content is original.