Cosmic - Frank Cottrell Boyce

I'm reading this really interesting book, Cosmic. The story was about a 12-year-old boy called Liam, who was usually tall compared to all those people around his age. Others would always see him as an adult who was 30. Since Liam was so tall, no one would hang out with him. Until his parents found out he has to learn more social skills, he went and studied at Little Stars, where he met Florida. They usually do things students aren't allowed to do in school, but since the guards thought he was her dad, they'd never disturb. But that's also a good thing. Liam pretended to be Florida's dad, and he even won a prize to be one of the greatest dad, and those winners, could take a chance to get their children to the Infinite Possibility, the greatest ride in the whole world, and they'd be going out into space. But the worst thing happened, adults couldn't go on the ride. One chosen responsible adult will be taking care of the rest of the children, and that absolutely wasn't Liam. But then, how is he supposed to trust that kind of dad who doesn't even know that the moon has no innate luminescence? Before you go, you make sure you've got all that you need: skills, equipments, money, health,... But what did he have? Nothing. He's just a big, grinning, empty-headed troll. Now Liam and the rest of the adults were entrusting their kids to him. What is Liam supposed to do now? Handing his 'daughter' to that guy?