River IQ

Family raft feud. You'll also see this called 'Japanese IQ Test', but will more likely recognise it as a fiendish variation on that classic puzzle where the farmer's trying to transport a fox, a chicken and some corn without any of them eating each other.

We don't know what's up with this family, but you can't leave the father near the daughters without the mother being present, the mother near the sons without the father, or the thief near anyone without the policeman. Plus, only adults can work the two-person raft - hopefully you'll be able to figure out the finer points before you tear your hair out.