Wood TrickSpace Junk Robot 3D Wooden Puzzles for Adults and Kids to Build - Rides up to 13 ft - 9.5x6.7 in - Model Kits for Adults - DIY Wooden Models for Adults to Build

I really enjoyed how this turned out. It is fun to watch it run across floor and then you can have it put the "trash" in the bin.I am 83 years old and have found that these puzzles have kept my mind sharp and able to reason out what needs to be accomplished. This was the 12th wood puzzle I have assembled. Since the first one, I have taken greater care with the sanding and waxing of the gears. If you take the time to sand each part (no matter how small) and remove all of the little tabs where the part was attached to the part board, everything will work much better. The tabs may seem insignificant, but if you leave them on the part may not fit as snug as needed and result in a poor performance or look. I even sand the finished sides of each part to make sure they were smooth.When it comes to waxing the gears and necessary surfaces make sure to follow the instructions. If the part is not waxed properly, it will bind up and not function well.I also only work on the puzzle for about an hour or so a day, as my fingers get a little sore pushing the parts together. Because I take great care in getting the parts ready for assembly, it takes me longer than the stated time to assemble the puzzle.My main advice is to take your time and think of the puzzle as a piece of art that needs to be carefully created for future enjoyment.

ok but dosent go to far

Er ist etwas tricky - gerade die Winkel der Ärmchen müssen genau passen, damit sie rauf und und runter gehen und mit der Feder hab ich anfangs ziemlich gekämpft, das war aber meine Schuld, weil ich nicht genau kapiert habe, was die Bilder bedeuten sollen. Erst kann man die Rückseite aufsetzen, alles befestigen und dann kurbeln, bis man die Feder von außen wieder einhängen kann. Ist trotzdem noch ein ziemlicher Kraftakt, geht aber.4 Sterne deshalb, weil man wirklich seehr viel Kraft und Wachs braucht, um die Teile zusammenzudrücken.Ich wachse inzwischen einfach alles, sonst ist es ein echtes Gewürge.Im Gegensatz zu der motorisierten Murmelbahn, die m.E. nicht gut ist, gibt es den Kleinen hier auch ohne Motor und der funktioniert.Tolles Teil, auch wenn mir jetzt sicher noch ein paar Tage die Finger wehtun werden.

the gear box was amazing how it all fit and operated mine really moves quite well but sanding and waxing the parts are crucial and the markings on the gears need to be paid attention to

97 year old father enjoyed this project. Winding up the spring was the worst part. It assembled nicely and words as describe. Directions could be a little clearer.