Can SpongeBob and Patrick handle babysitting Narlene’s wild little brother Nobby? And should they be worried when he’s too well behaved? Children ages 5 to 7 who love Nickelodeon’s animated series will enjoy this super-silly Step 3 Step into Reading leveled reader. Step 3 Readers feature engaging characters in easy-to-follow plots about popular topics. For children who are ready to read on their own.