Karen's Dinosaur (Baby-Sitters Little Sister #73)

Roarrrr! Karen is thrilled. Her class is going to New York City! She can’t wait to see her pen pal, Maxie, and have a picnic in the park. But best of all, Karen’s and Maxie’s classes are going to the museum -- to see dinosaur bones! Then Karen gets in a fight with her stepbrother. David Michael is mad because he can’t go see the dinosaurs. Is David Michael going to ruin Karen’s trip?