Help me find pink cat book

I'm trying to remember the name of a children's book i remember. It would have to be from before 2010s. It was a book in my dentist office. The book was about this sister and her friends who are having a yard sale of donating things one of which being the sisters old plush cat. The sisters little sister takes the cat and starts playing with it. I can remember bits and pieces like the sisters little big sister carrying a box in the basement with the stuffed animal cat and other toys, the little sister and big sister on the swings at the park and on the slides, and the little sister drawing. I'm pretty sure the cat was pink or blue, plaid/patchwork, had a ribbon around its neck, and was drawn on and falling apart. Please help me find.