These traditional wooden blocks let little architects and urban planners explore a variety of building options with these quality hardwood sets of all sizes. Unit blocks, interlocking wooden blocks and more. Blocks teach problem-solving skills through the discovery of how stacking and matching can produce different results. They are also components of pretend play, because, using a little imagination, a child can build anything! The number of positive outcomes is limitless, so children can continue playing until they've reached a level of personal satisfaction.