This reaction should be done in a lab by someone who understands the dangers. Sugar is a carbohydrate, so when you remove the water from the molecule, you're basically left with elemental carbon. The equation is:
C12H22O11(sugar) + H2SO4(sulfuric acid) + 1/2 O2(oxygen from air) → 11C(carbon) + CO2(carbon dioxide) + 12H2O(water) + SO2(sulfur dioxide, toxic)
Equal weights of sugar and sulfuric are mixed. After about forty seconds, the mixture's color changes from light brown to black, accompanied by an increase in temperature and copious amounts of smoke made up of carbon dioxide gas, sulfur dioxide, and water vapor. The column of carbon expands to fill and then overrun the container in which the reaction takes place. If you do this demonstration, use proper safety precautions: wear gloves, safety glasses (a few cents each), and a lab coat. It's preferable to perform the demonstration inside a fume hood.
I hope more people will consider majoring in science, math or engineering. The world would be a better place if more people knew more science, since we would find solutions much faster to the challenges we face. :) Science & technology allow for a lot of artistic expression, so one can do art while being a geek or nerd. :)
Science will allow us to bring what is thought of as sci-fi or magic into the everyday reality, things like curing aging or eternal youth, telepathy, teleportation, shapeshifting, physical immortality, world peace as explained in the tech-filled videos at https://plus.google.com/+AlexP/posts/URSW7eeNhhf (some videos feature the Google Director of Engineering who talks of Physical Immortality often).