In preparation of our solar eclipse PBL workshop, my parents came to play. And they brought the Astromedia solar projector cardboard kit! It took us the better part of a day to assemble, but when we were done we could even test it in a sunny corner of my couch!

There were tiny twigs between the projector and the sun, which made for beautiful projections.

Plus it was amazing to watch how fast the sun was moving (or, to be precise, the Earth was turning). In the space of 30 seconds, the projection changed from the left to the right photo below!

Shadows of twigs. Absolutely same angle and everything, 30 seconds apart.