For safety, I took my time putting it together and it only took 2 days including leveling the installation area (which was the most difficult part).  Make sure to take inventory of all the parts and organize your work area and assembly will be a snap! My little one was blown away and I couldn't be happier with the purchase. So far its been a racecar, a firetruck, a spaceship, and pirate ship (i.e. Its even more magical to imaginative little minds than expected)! Would highly recommend Gorilla products to anyone in the market.