My spouse put this together for my granddaughter. It was super easy to put together. It took him less than half a hour.The kit comes with instructions for four models. We put together the Engineering Truck Robot. My spouse did not have any problems putting it together but I see how it would be difficult for a child to do it. The instructions are not that great.The blocks are durable and once put together they stay together well. They are nice primary colors and comes with cute eyes. My granddaughter loved using the remote to make it go. Requires 6AAA batteries that are not included. I received this product for free. All my reviews are based on my own experience and evaluation of the product so that others can benefit in finding quality products that meet their needs & expectations.