Review on Master the Art of Mechanical Construction with ROKR Building Construction Mechanical Pendulum by Tay Fair

My grandson and I cut out the pieces which was fairly easy. Gear assembly was fairly easy. But it would be nice if each cog was labeled ab, 1, 2, or 3. The frame is quick to assemble, just be careful with the supports, they are quite fragile. You'll have to grind down the little brackets or risk breaking them during installation (not that that's happened to me). I don't know how often I watch videos to make sure which gear needs to be placed in which position. When we mounted the marble walkway. All ramps were marked so mistakes were possible. I found that when inserting the gears we had to adjust the spacing to allow the gears to mesh. After that I was able to get it working for over 20 seconds so I tried the wax worked a bit. Then I tried 10w40. I tested it on some discarded pieces for discoloration. There weren't any so I sterilized the little gears and they worked for a while, 10-15 minutes. I just want spring to get stronger. Looks great and is a good conversation piece