Rico Rodriguez, Nathan Kress & More Have a Good Time with Camp Ronald McDonald

Rico Rodriguez catches up with his favorite detective dog, Scooby Doo, at the 2011 Camp Ronald McDonald For Good Times’ 19th Annual Halloween Carnival held at Universal Studios on Sunday (October 23) in Universal City, Calif.

The 13-year-old actor was just honored the day before at Variety‘s Power of Youth event for his involvement with the charity.

Rico was joined by sister Raini and pals Nathan Kress (as Where’s Waldo), Ariana Grande (as Susie Homemaker), Josie Loren, Allisyn Arm and Audrey Whitby (as the Shining twins), Zendaya, Caroline Sunshine, Adam Irigoyen and Sammi Hanratty, and more!

The celebrity Halloween Carnival is the largest fundraising event for Camp Ronald McDonald, a medically supervised sleep away camp for kids with cancer.