They're everywhere, those bright, weird, beautiful shapes called fractals. Fractals are geometric figures, just like rectangles, circles and squares, but fractals have special properties that those figures do not have. There's lots of information on the Web about fractals, but most of it is either just pretty pictures or very high-level mathematics.
Every lesson has a print version for classroom use.
Students in Mr. Lynch's class in Sandpoint, Idaho created this 12th iteration Jurassic Park Fractal. It took 256 copies of their original to make. Here's last year's 11th-iteration version. Third grade students in Ms. Renner's class at Alief ISD's Chambers Elementary in Houston, TX made this this 9th iteration Jurassic Park Fractal.