This is NOT easy to assemble. The holes are not all evenly spaced, so sometimes you will get three poles in at right angles, and then have to disconnect all three poles because there isn’t an available 45* angle. Even having the etched hole facing up, the angles don’t always work.On top of that, it requires a ton of force to get the pole all the way in the balls. My six year olds can get them part of the way in, but not enough for it to stay.However. When it is fully assembled, it stays well. Even if one pole gets bumped out, there is enough support for the item to keep its shape. It even holds its shape with a sheet thrown over it. There are a ton of things to build with it, and my kiddos seem to thoroughly enjoy it.