This is a clock that tells you if you guessed the right time! When someone moves the hands on the clock, two rotating discs attached to the hands will move under the clock face as well. When you guess what time the hands on the clock are pointing to, you can uncover the bottom panel and it will reveal the true answer! Demo: https://www.youtube.com/watch?v=FTeHo4a8FYM Optional dual extrusion method! - See "Instructions" tab for more detailsThe studs on each face are for guidance purposes only. I highly recommend using glue on the bottom of each face instead of just trying to press fit it. Parts List: 1 x Clock Face 1 x Base Housing 1 x Hour Hand 1 x Minute Hand 1 x Hours Disc 1 x Minutes Disc 1 x Cover Optional - DUAL EXTRUSION ONLY: 1 x Clock Face - DUAL EXTRUSION 1 x Cover - DUAL EXTRUSION 1 x Minutes Disc - DUAL EXTRUSION 1 x Hours Disc- DUAL EXTRUSION Start with the Base Housing. Set the Minutes Disc into the Base Housing, and then set the Hours Disc into the Minutes Disc. Next, put the Clock Face on top and fit the 3 grooves from the Base Housing into it. After that, put the Hour Hand into the hole in the Clock Face, and put the Minute Hand into the hole in the Hour Hand. When inserting the two hands, make sure the Hour Hand is pointed toward the 6 on the Hour Disc and the Minute Hand is pointed toward the 30 on the Minute Hand. Finally, slide the Cover into the slot on the bottom of the Clock Face. DUAL EXTRUDER USERS: If your printer has a duel extruder, I have provided 4 extra, optional files you may use. These files will allow you to color the numbers and marks on the discs and the face a different color to see more clearly. Simply plate the - DUAL EXTRUSION files with their counterparts and set each file to use a different extruder. (Cover is plated with Cover - DUAL EXTRUSION, etc).