McKenna Black of Immaculate Conception School in Celina pets a stuffed puppy as she pretends to make a public service announcement commercial for pet adoption, during a special program at the school on Thursday. The video clip - including special effects that placed a dog kennel behind her - was part of a hands-on program to teach students how TV shows and commercials are made. Holding cue cards for Black is classmate Evan Stachler.