Get started with this fun DIY kit. Choose a nice spot where the birdhouse can hang and the project can begin! All you need is a hammer as everything else you need is in the kit. The boards are made of light wood and the birdhouse has a 25 millimeter hole for the entrance. Size: 13 centimeters high and 16 centimeters wide. The depth is 14.5 centimeters. Includes instructions.