Marijuana gingerbread cookies, like this one sold at The Apothecarium in San Francisco, could easily appeal to kids. Jeff Chiu/AP hide caption

itoggle caption Jeff Chiu/AP

William von Schneidau, who owns the BB Ranch butcher shop at Pike Place Market in Seattle, has made prosciutto from pigs fed marijuana. Courtesy of BB Ranch hide caption

itoggle caption Courtesy of BB Ranch

Colorado lawmakers approved two taxes on marijuana — a 15 percent excise tax, and a 10 percent sales tax. A photo depicts a quarter of an ounce, left, and one ounce of marijuana, along with a handful of rolled joints at a Denver dispensary. Ed Andrieski/AP hide caption

itoggle caption Ed Andrieski/AP

A customer rolls a joint made of half marijuana and half tobacco in Olympia, Wash., on December 9, 2012. Nick Adams/Reuters/Landov hide caption

itoggle caption Nick Adams/Reuters/Landov

People at a Denver party early this month celebrate the recognition of an amendment to the Colorado constitution legalizing recreational use of marijuana. Brennan Linsley/AP hide caption

itoggle caption Brennan Linsley/AP

A woman, identified only as "Hurricane," lights up in Seattle. Washington state's law legalizing the recreational use of marijuana went into effect on Dec. 6. Cliff Despeaux /Reuters /Landov hide caption

itoggle caption Cliff Despeaux /Reuters /Landov

A young man with a joint in his left hand jokes with the photographer as he passes a sign prohibiting the use of marijuana and alcohol, in a designated area in Amsterdam on Wednesday. The city's mayor says students would be formally banned from smoking marijuana at school as of Jan. 1, 2013. Peter Dejong/AP hide caption

itoggle caption Peter Dejong/AP

Did eating binges come first? iStockphoto.com hide caption

itoggle caption iStockphoto.com

A young cannabis plant at grows at The Joint Cooperative in Seattle, Washington Jan. 27. Cliff DesPeaux/Reuters/Landov hide caption

itoggle caption Cliff DesPeaux/Reuters/Landov

Maine voters overturned a gay marriage law through a citizens' veto in 2009. Maine voted again on the issue today, thanks to an initiative put on the ballot by voter petition. Above, gay marriage supporters gather at a rally outside of City Hall in Portland on Sept. 10. Joel Page/AP hide caption

itoggle caption Joel Page/AP