My camera is broken

I discovered my camera's brokenness a few days after we got home from Colorado.  August 19th, to be exact.  We went to the park.  The pictures all turned out like this:

When my camera broke, I decided to save the last of the pictures I took in Colorado.  The following were taken of Dillon on August 13, the day we left to come home.  The dancing videos are also from that day.  Make sure you watch Dillon learning the worm.  He's perfected it now, but his first attempts are probably funnier than his current execution.

These were taken on September 19th in Keokuk. We went up with Nonna to take pictures of Poppa's beautiful Bed and Breakfast. She had to go with us so I could use her camera.  Mine is broken.  I'm really very sad.  If you have any idea what might be wrong with it, please, venture a guess.  It is a Nikon d40.