SKOWHEGAN — If you give a moose a muffin, he’ll want some jam to go with it. So goes the story in the children’s book illustrated by Felicia Bond and written by Laura Joffe Numeroff. But if you have about 1,000 people calling a moose all at the same time in the same place, what happens then? Well, according to the folks at Main Street Skowhegan, you’ll set a record and be tops for the moose calling category in the Guinness World Records book. The world record moose call will mean that at least 995 people will be issuing the same backwoods bellow all at the same time, said Kristina Cannon, executive director of Main Street Skowhegan, which is sponsoring the event. “We’ve all been practicing our moose calls for the Guinness World Record attempt for the most people moose calling simultaneously,” Cannon said.