You can take books out of any public library that will teach anyone how to build bombs out of ordinary easily acquired substances and parts, books like the Anarchist Cook-book.
Probably way safer security-wise than a search on the Internet, unless using a computer at the library. Kids everywhere have always experimented with explosives, and always will. Mostly boys, however. My mom was always upset with me blowing up toy cars, etc., nearly took my fingers off a couple times. My grandfather used to dry homemade gunpowder on the stove (long before I came along, would not want to see that). Amazing that house-hold items like baking soda and cotton can be transformed by heat and mixing with other ordinary home chemicals.
Think about that... A teacher, concerned that the student drew a fire covered glove on his textbook contacts authorities who search his home and find... materials that MIGHT be used to make a bomb and then CHARGE him with possession of an explosive device.
Now, contemplate how this new story might apply to you... Do you have bleach, draino, flour, baking soda, matches and gelatin in your home?
Very frightening that such a thing can happen in the US.