Perfect for a compact size room.. Sturdy wood material. Assembly instructions is fairly easy but requires 2 people as it is quite time consuming. No power tools require but you need a flathead screwdriver and the star-shaped version as well I apologize if Im not mentioning it correctly.  Everything else needed is included in the packaging. Make sure the mattresses are twin sizes not twin XL since it is much longer... sometimes people dont realize the difference...  just thought to mention it..  thickness should be no more than 6 inch, width should be 39 inches and length... 75 inches for best results. Follow the instructions properly and you will love your final results.. My kids love it..