Children love to dismantle and reassemble the blond wood set's components.

WSJ: Midcentury-Modern Furniture for Kids

Among the largest underlying components of WOOD, in trading today Rayonier Incorporated ( RYN) is off about 0.1%, and Plum Creek Timber Company Incorporated ( PCL) is lower by about 2%.

FORBES: WOOD, RYN, PCL: Large Outflows Detected at ETF

It takes about a year to build a Steinway from 12, 000 components and eight different kinds of wood including maple, birch, spruce and poplar.

ECONOMIST: A tale of three piano makers

Many of the learning resources, such as toys, booklets, games and drawings, were produced by the teachers themselves (sometimes with the help of students and parents) who used local fabrics and other non-expensive components, such as paper, leaves, wood, and clay.

UNESCO: World Teachers' Day : making a difference