Benny and Penny in Lights Out!

"In the mouse siblings' fourth book (Benny and Penny in the Big No-No! won a Geisel Award in 2010), Hayes brings beginning readers into the magic hour that precedes lights-out for the night. Sliding from bedtime story-inspired flights of imagination to flashlight-enabled frights to a secret journey outside to rescue a favorite toy from the dark of the playhouse, Benny and li'l sis Penny exhaust themselves as only children know how.
As with all TOON books, the pure charm of the story has the added bonus of introducing and richly contextualizing word recognition for the kind of terms kids need to know, like pirates, spooky, BURP!, and princess dinosaur (a perfect rendition of sibling compromise). Hayes' sense of the bouncing rhythms of children's play, grasp of sibling social dynamics in true-to-life scenarios, and especially his adorably huggable, crayon-colored characters have made him the standard-bearer of early-reader comics."-BooklistIt's nearly time for lights out but Benny and Penny just can't settle down.
The moon has gone missing, there's a flashlight to play with, Benny can't sleep without his favorite pirate hat-and he left it inside the spooky backyard playhouse!