This sci-fi classic, dating back to before man entered space, is based on the idea that adults would be unable to adapt to zero gravity conditions. Because of this, teenagers would be the first explorers of space, launching to orbiting space stations and the moon.
This is very much a Boy Scouts in space story. The science is very old and totally implausible. The story gets a bit repetitive and the characters totally bizarre behavior can get a bit irritating.
However, on the spirit of the old Heinlein juvenile series and Enid Blyton meets Skylarks in Space it is worth a go !