I have purchased quite a few of these...this review is for ‘Nuts’.This little building is adorable and challenging. I love the detail.Builders should also understand that this level of detail in an area this small can be a problem. ‘Nuts’ is a two story building, so a little common sense is in order (I learned this the hard way). I built the two stories separately, as instructed...but when I tried to put them together, the bottom half disintegrated. My bad. I should have known it would happen. I reassembled it and used Loctite Super Glue on the weight-bearing bits. I used tweezers for precise placement (‘bonds skin instantly’ says the label. They aren’t kidding.). Then I had to repeat the tweezer/glue process when I positioned the large acorn and squirrel on the top, causing the roof to collapse.I will continue to build these tiny buildings. I love them. But from now on, Super Glue is my friend.It was a great kit and they gave you extra pieces. Unfortunately I was missing one piece that I didn't get an extra of; but it wasn't a big deal. I was still able to complete the build. These are smaller than traditional Legos and some were hard to push together with just my fingers. I used the tool included, I believe it's to help take apart the bricks. The instructions are one giant sheet, which made it hard sometimes because of the creases. I really enjoyed it. It was challenging and took time to complete.These pieces are tiny, half size of legos. I found it enjoyable to assemble. I was looking for a amusement theme ones, and was glad to found this. I had no problems with pieces not staying again. My issues were i dont like fold out paper, a booklet works better and gives you more workspace. And the graying pieces from previous steps made it confusing.11 yr old loved challenge of putting together this tiny building block project. Nice change from lego size blocks. Very detailed.I’ve bought three of these and they’re so fun. Lots of extra pieces. Complete result 100%Very cute idea but very SMALL pieces. Much smaller than legos. It took at least 3 hours to assemble.