If you're not using the interactivity (or as well as using it!), you might want to print off these triangles
to cut out. You could cut them out of tissue paper or overhead transparencies if you want to investigate overlaps.
What makes a 'jewel shape' different from one of the shapes in the first group, do you think?
It's good to talk about what others see in the designs you've made. Sometimes they will see shapes you may not have noticed.