Love your cupcakes! My husband got me the cookie cutters. He either found them on Amazon (https://www.amazon.com/ComputerGear-Science-Lab-Cookie-Cutter/dp/B00F0YDOMM) or think geek may have had them at the time. The petridish is just a circle biscuit cutter.

Thank you :). You can get them on Amazon (https://www.amazon.com/ComputerGear-Science-Lab-Cookie-Cutter/dp/B00F0YDOMM)