If you have experience with building scale models, then you shouldn't have any trouble with this, and they do include QR codes at a few points in the instructions for online videos to show how certain parts go together. Total build time is about 8 hours.In addition to the tools and parts included, I would also recommend a sharp hobby knife, tweezers, and either fast-setting wood glue or a superglue which works on wood... while the parts all go together well, some need a little reinforcement. Just be warned that some parts are more fragile than others, so be very careful when removing parts from their sheets.It's a good build, working from the base on up, separated into sections - the 'elevator', the whole gearing mechanism (you need to see the eccentric gear at work raising and lowering the elevator - some very nice engineering there), the ball path tower, and the multiple path platform. Section by section, and it all fits together. I would definitely suggest using the wax they include as they show to avoid friction between the woon parts, and to make it all smoother. Also, make sure that the ball at step 5 is firmly pressed into its 'basket'... you'll understand its purpose as a counterweight and a path blocker once the build is finished.The only addition I would make to the build is step 41 - take a piece of narrow scrap from one of the wood sheets and glue it on top of piece F12, about an inch long, from the corner and along the long side of the piece... if the ball is moving fast enough, it might actually jump over the rail formed by F12.Overall it's a fun build, and watching the elevator - and the upper gear - at work is fascinating. I would recommend this to someone who enjoys building and mechanisms, or as a gift for the same reasons.