Abstract: A toy log assembly set is disclosed having various length stackable log-like structural members, nail-like fasteners and a hammer for building composite structures like a house or cabin and stimulating child development. Structural members may include base pieces and/or stacking pieces that are used to form the foundation and walls of the composite building structure. Each of the pieces has an aperture for receiving the fasteners to secure the pieces together and some or all of the apertures are countersunk to receive the head of the fasteners. A hammer may be used to insert the fasteners completely in the apertures.