Matt Grozier, 8, and his neighbor, Alyssa Boyd, 5, at her lemonade stand near Lightstreet, Pa., in 2007. Bill Hughes/AP hide caption

toggle caption Bill Hughes/AP

With help from adults, Zachary Swauger, 12 (left), and his brother Joshua, 9, launched their own parent-monitored social networking site for preteens. Charlotte Observer/Jeff Willhelm/Getty Images hide caption

toggle caption Charlotte Observer/Jeff Willhelm/Getty Images

March 2 is Dr. Seuss Day, also known as Read Across America Day. In 2003, Supreme Court Justice Stephen Breyer, sporting a Cat in the Hat hat helped celebrate the day by reading Dr. Seuss's Oh, the Places You'll Go! to elementary school students in Washington, D.C. Evan Vucci/AP hide caption

toggle caption Evan Vucci/AP

Los Angeles Laker Kobe Bryant (above) was recently fined $100,000 by the NBA for calling a referee the Fa-word. Joakim Noah of the Chicago Bulls was fined $50,000 by the league for saying it to a fan. Kevork Djansezian/Getty Images hide caption

toggle caption Kevork Djansezian/Getty Images

In 1919, the Illinois State Hotel Clerks Association held its third annual convention in Decatur, Ill. There are more than 92,000 trade and professional associations in the U.S. Library of Congress hide caption

toggle caption Library of Congress

Billionaire investor Raj Rajaratnam was convicted of insider trading. Prosecutors had alleged he made profits and avoided losses totaling more than $60 million from illegal tips. Louis Lanzano/AP hide caption

toggle caption Louis Lanzano/AP