This Wren House Kit encourages young folks to think about cultivating wild birds in the garden, and how some birds have different requirements than others. It is easy to assemble and takes very little effort to maintain once it is built. The entry hole size is also specific to wrens so you do not need to worry about other larger and more aggressive birds entering the house. This item is a fun family project and all it requires to build is a Phillips screwdriver. Not only that, but wrens are beneficial to any garden area. The package of this kit measures 15cm wide x 7cm tall x 19cm long.