Manzanita Modular Walls Building Set: Deluxe Designed and made by a young family out of their Seattle cottage, this charming series of interlocking wood walls was first created as a toy for a child of family friends. The concept is simple: 3/8 inch (0.9 cm) thick wood walls are notched so they can be slipped into other walls to create imagined buildings, enclosed spaces and even villages. Walls range in height and length and are variously shaped with crenellations, doors, windows and roof lines to give the whole a fantastical character limited only by the childs imagination. Hand-crafted in the USA from high-grade birch plywood, an eco-friendly, durable material. Walls are left natural and unsealed. There are 18 pieces to a Standard set and 28 to a Deluxe set, ranging between 6 and 11 1/2 inches high (15.2 to 29.2 cm), and from 5 to 11 1/2 inches (12.7 to 29.2 cm) long.