Hotel Commonwealth hosts the fifth annual Bedtime Stories storytelling and pajama party for families in Boston on February 21 and 22. This year’s theme, “Baseball at Bedtime,” celebrates America’s favorite pastime with an appearance by Wally the Green Monster, beloved mascot of the World Series 2013 Champion Boston Red Sox, who will pose for photos with kids. Children are encouraged to wear their favorite pajamas or baseball gear while listening to storytellers and performers from ReadBoston. Hotel Commonwealth will also debut its second children’s book featuring Terry the Bear. Afterward, kids can enjoy a make-your-own hot chocolate bar with a variety of flavors and toppings.