The sentinel paper with the binary tree maze was used to describe how ants can locate food on one of several ‘leaves’ in a ‘binary tree’ maze. In each trial, one scout was placed on a certain leaf of the binary tree, with food, and could then return to the foragers in the nest. The Mazeengineers binary tree maze comes with both the tree as well as the artificial ant nest. The binary tree comes with 4 forks.