Google Tricks 1

Zerg Rush- Makes "O's" pop up on your screen and you can click them. It gives you a score at the end.
http://www.google.com/#hl=en&safe=active&tbo=d&spell=1&q=zerg+rush&sa=X&ei=YvAbUfDUNYSc8QT444HwDw&ved=0CCwQBSgA&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.&bvm=bv.42261806,d.eWU&fp=d2b9bff5100b9809&biw=1665&bih=725&surl=1

Google Loco- When you type in the search engine it changes colors.
http://www.thatsloco.com/

Do a Barrel Roll- Type in "Do a" and the whole page literally rolls.

http://www.google.com/#hl=en&sugexp=les%3Beappsweb&gs_rn=2&gs_ri=hp&qe=ZG8gYQ&qesig=ECcuGnE_moo6XsDHruapmw&pkc=AFgZ2tkK4saUPrLX2V7LAVJatMkZm2pSNorPkxS_X7kXGRHTd2ytMRS8cAuIOOuoPWkJjEhSr8jf-Sew3jMUnIj5XpE5-M9v9Q&cp=4&gs_id=7r&xhr=t&q=do+a+barrel+roll&es_nrs=true&pf=p&tbo=d&output=search&sclient=psy-ab&oq=do+a&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.&bvm=bv.42261806,d.eWU&fp=d2b9bff5100b9809&biw=1665&bih=725