This K'nex Pac-man roller coaster building set was a lot of fun to put together. I was going to give it to my nephew, but being an 80s kid myself, I had the sudden urge to keep it and put it together myself. I took out all the parts, and it all had very clear instructions on what went where. It didn't take too long before it was eventually all assembled, but it was a fun thing to build. So whether or not you have kids, you're still going to have fun putting this together. Overall, it was fairly simple, but was a fun project too that took following instructions. I'd recommend this to all ages above 9, but even some exceptions can be made for maybe 5 or 6+ if there is an adult working with them and explaining things. I know my nephew will have fun with this, even if I've already put it together, and he's 6. K'nex makes such great products; so engaging-- You can always expect to have a great time with K'nex.