Adirondack Chairs
DIY projects for building Adirondack chairs can sometimes be complicated, but this chair is assuredly not difficult. You do need a table saw and a jigsaw, but it would be easy for adults or teens to do the cutting and let younger kids do the assembling.
The chair can be made from hardwood (aspen, maple or oak) or softwood, such as pine, cedar or cypress. Adirondack chairs are traditionally painted, but they also look great with a natural finish.