An opuscule can be a children's play set with the simple addition of a roof and railing to define and enclose the space. The addition of a small chair completes the transformation of the space from a pass-through to a destination.More: Complete Your Garden with a Backyard Cottage14 Picture-Perfect PlayhousesSecret Forts IndoorsTiny Home Built for Big AdventureGuest House and Grotto in 68 Square Feet
Forts and slides are always backyard favorites. If you're feeling ambitious, a setup like this may take a long weekend to complete, but the memories made for your children will be with them for years to come.
"What I've found in raising four boys and building treehouses is that kids love big boxes as much as the gifts that come in big boxes," says landscape architect Keith Willig. "Meaning they like it simple and in a way that allows them to use their imagination. So we typically use recycled material, old fence boards, windows and doors." Surprisingly, it took two workers only three days to build this inventive structure.