ALA Booklist (Mon Mar 01 00:00:00 CST 2010)

The delightful mouse siblings, Benny and Penny, are back in their third book. This time, they try to hide all their toys from Cousin Bo when he visits, because Bo tends to break their toys whenever he plays with them. They try to avoid Bo as they go on a treasure hunt, but he keeps wanting to play with them. Hayes, who won the 2010 Geisel Award for Benny and Penny in the Big No-No! depicts another true-to-life situation as the young cousins work out their relationship in a manner authentic to the way children resolve their own issues. The story has just the right amount of conflict and tension for young readers, and Hayes' simple panel and page designs and dialogue balloons continue to provide an easy and appealing introduction to reading d to reading comics.

Kirkus Reviews

The popular and Geisel Awardwinning mouse sibs ( Benny and Penny in the Big No-No! , 2009) meet their greatest challenge yet when hard-playing, toy-breaking cousin Bo saunters over for a visit. Ignoring their efforts to stonewall him, Bo aggressively messes up the sandbox, snatches Benny's homemade treasure map away and generally makes a nuisance of himself while sneering "Oh, are you going to tell your Mommy?" Eventually the tables turn when Bo needs help getting un-stuck from a hole in the fence, and by the end he shows preliminary signs of acquiring better socialization skills. All three furry playmates sport eloquent eyebrows and other easy-to-spot emotional markers in Hayes's sunny backyard scenes—and even prereaders may note that when toys get broken here, it's while Benny or Penny are trying to grab them out of Bo's hands. A thought-provoking episode just right for the I Can Read set. (Graphic early reader. 5-7)

School Library Journal (Thu Jul 01 00:00:00 CDT 2010)

PreS-Gr 3 At last, Penny and Benny have a reason to get along. Cousin Bo has just arrived on the scene, which means that all of their toys are in imminent danger of being destroyed by their full-speed-ahead relative. They unite in an effort to hide or bury as many things as they can before he descends. Especially at risk is Benny&9;s treasure map that leads to backyard &4;loot.&4; Bo quickly discovers it and leads the two on a chase as he plays keep-away with it. When he engages in a tug-of-war over Penny&9;s beloved monkey doll, a leg gets ripped off and Benny yells at him for his inability to &4;Play nice.&4; Bo runs away in anger, but gets caught in a fence and can&9;t free himself. By the end, all has been forgiven. Even Bo redeems himself when he presents Monkey with a get-well card. The cartoon expressions on the characters are priceless and easily &4;read&4; by nonreaders. Children will pore over the appealing illustrations and enjoy checking out the interactive website that is dedicated to the Toon characters. Maggie Chase, Boise State University, ID