Blast From the Past (Allie Finkle's Rules for Girls, Band 6)

Allie is looking forward to her class trip - even if it's only to a historic schoolhouse. Mrs. Hunter announces that every student has been assigned a 'buddy' for the day-from Allie's old class -and her buddy just happens to be her ex-best friend Mary Kay, who betrayed Allie right before she moved! And with renovations going on at Allie's house-there's a hole in the wall that her kitten, Mewsie, keeps disappearing into. What if Mewsie gets trapped inside the wall forever? It looks like this is one trip Allie's going to need to write some major rules for.