This is a creation kit, not a finished product. Assembly time is estimated to be 8-24 hours. ＜Required Tools＞ A hammer is needed for the process of hammering nails into the domino fulcrums. Phillips screwdriver ＜Difficulty＞ It's not difficult, but it requires patience. Attaching 30 dominoes and the link mechanism will be challenging. ＜Power Source＞ 4 batteries ＜Size＞ 72cm * 15cm * 9cm ＜Video＞ Search "無限ドミノ" (Mugen Domino) on YouTube.