Build your own Fascinations Metal Works Washington Monument. Complete your construction of the all metal kit in about 30 minutes rather than the 30 years it took to build the actual monument. In the video, Lulu's building time is about 11 minutes, however a novice would take longer. Easy Assembly Level: Simple piece to piece fitting with a completion time under one hour. Completed model Washington Monument stands a little more than 4 1/2 inches tall.