While using a Time Rewinder, Charlie Cosmos and his friends make an exciting discovery. A time capsule is hidden somewhere in city hall! Can they track it down in time for their presentation at the Banneker City Festival? Young readers will find out in this fun and funny sci-fi adventure! With easy-to-read text and art that pops off the page, every early chapter book in The Cosmos Family series takes readers on a joyous journey into the future.