Fully threaded trees are introduced as data structures suited for adaptive mesh refinement. They are described, implemented, and tested by Khokhlov in his paper "Fully Threaded Tree Algorithms for Adaptive Refinement Fluid Dynamics Simulations", J. Comput. Phys 143, 519-543 (1998). I present an implementation of the fully threaded tree, and a driver interface similar to Frans Pretorius's AMRD. Please report comments or errors to Roland Stevenson.