Continuing with the space and dinosaurs theme:
I get my transition years to do a project on absolutely any topic on Science which interests them, preferably something off the beaten track (i.e. not in the textbooks). fortunately this doesn’t seem to be a drawback in the slightest. Almost no aspect of science which interests them is on any science syllabus.
Because I am as likely to be interested in their topic as they are, I suggested I would look for resources also and post them here.

In relation to fractals, the classic video is called The Colours of Infinity. The original DVD and accompanying book is available in the school library.
The problem for anyone doing a project on dinosaurs is sifting through the vast information that is out there. This clip is pitched at about the right level.

The Colours of Infinity:

When Dinosaurs ruled America