Here is a simple handout that your students can label for a visual understanding of how the seasons relate to Earth's orbit. Students can also draw in the equator and the relative position of your city! This would also work as a pre-teach activity; have them guess which season goes where and write a brief explanation of their thinking, then pair up and discuss, etc etc.
*Remember to set your printer to "Fit to page", and set your photocopier to the "picture" setting so that grayscale looks nice