According to the actress' official website, Menzel will lend her voice to an episode entitled "Shelter from the Storm," which will be broadcast Sept. 8 on PBS; check local listings.
"Bespectacled aardvark Arthur Read demonstrates to kids how to deal with such childhood traumas and challenges as homework, teachers and bullies," according to an online description of the series. "He also has to contend with his sisters, but loves playing with his friends: tomboy Francine, foodie and best pal Buster, supersmart Brain, rich girl Muffy and geography expert Sue Ellen."
Menzel, who is currently on a global concert tour, won her Tony for her performance in Wicked.