A Scientist's Cake!

My son wanted a science birthday party. For his cake, I made this is an Erlenmeyer flask filled with green chemicals and red bubbles.  I used white butter icing to cover the entire cake. Then dyed some grean and put a thin layer over the white. I used candy apple candy for the bits floating in the green goo, and covered some red candy in green icing to make the explosion and cotton candy for smoke. Sparklers were used instead of candles.