love challenging students by having them investigate traversable
networks. I tend to print out one of these networks each day and
have the kids spend a few minutes trying to solve it. I then get
them to draw the network into their diary. Next I stick the problem
on the wall for any and anyone to try. NB You can tell a lot about
kids by watching them try and solve these problems :)
choose a starting planet and travel
across EVERY path without lifting your finger.