Here is Bobby, and Bonnie, two Tyranosaursus Rexs ganging up on poor Kelsey, the Triceratops. This exibit there at the Children's Museum is amazing, with very detailed descriptions, sounds, and even lighting and environment effects. We were there during a "storm" with very very realistic rain, and lightening sounds/flashes. Want to watch the video of said storm? Lookiee here...I took video just for you guyz. :D

http://www.youtube.com/watch?v=wPOWJsdWHP8