**UPDATE** The Spina Bifida Association of Colorado is offering a $500 reward for the safe return of Grandchamp's wheelchair. Officials with the SPACO say they only ask the chair to be returned in good, working condition.

Pierce Grandchamp was born with spina bifida, a birth defect where the spine doesn't fully develop. Pierce has been in a wheelchair his entire life.

Sunday night, Grandchamp left his wheelchair on the sidewalk outside his dad's house in Highlands Ranch so he could drive his younger sister to their mom's house just a few minutes up the road. It's quite an ordeal to get the chair in and out of his car, so he decided to crawl in from the passenger side, as he says he's done dozens of times in the past, to take her home.

But, when he returned less than 10 minutes later, his wheelchair was gone.

"At first, I thought it was a joke and that one of my friends was pulling a prank on me," Grandchamp said. "So, I called all my friends, and they were at work. That's when I realized it was stolen."

Now, he has no other choice but to use the wheelchair he had when he was 12 years old.

"I need that wheelchair because this one is about six years old, and it's way too small for me, which makes pushing difficult for me and makes my daily life more difficult," Grandchamp said.

Grandchamp's wallet was also in a bag on the wheelchair. He says there was only $6 inside. He canceled his debit card, and he's applying for a new license. However, there was a picture inside that he's cherished and carried with him since kindergarten. The photo is of one of his closest friends. He's really hoping he gets it back.

Grandchamp has filed a police report and says police are investigating.

He's also filed a report with his insurance company. However, he says he doesn't know if they will cover him. If they do, if could take at least six months to be processed.

"I think it's a really messed up act because I need this to get around. It's not like stealing a car," Grandchamp said. "Because you can walk, but I can't. I need this to get around."

A fund has been setup through Chase Bank under the "Pierce Grandchamp Wheelchair Fund".