A Flying Birthday Cake? (Marvin Redpost 6)

When Marvin and Stuart sleep over at Nick Tuffle’s house for Nick’s birthday, they set up sleeping bags in the back yard. Stuart and Nick go right to sleep, but Marvin tosses and turns. Then he hears a noise and something glowing zooms over his head. Is it really a flying birthday cake? Or could it be something even more bizarre? The next day, a very strange new kid shows up at school….