I have two 6-week old kittens. One was starting to scratch and they both love to climb so I knew they needed a tree to curb indoor boredom. The tree came in a box I could lift and it was delivered fast. It came with picture instructions and with two kittens playing around me I managed to build the tree in under an hour. I made sure to tighten the screws and it is very sturdy. Day two I walked into the kitten room and they were playing together on the third tier! Success!!! They love their tree. I love it too I’ll dangle a wand toy over the tree and they both play with me and each other.