Here is a vid of my 5yr old helping me put together a cube. It took about 5 min per cube to put together. https://youtu.be/ntCsm0ajk4o Very inovative product. The white ones are more stable then the pink ones because white have a slit for the back panel to slide into. I'm not sure why the pink were made diff. I love the ingenuity behind this product and that its eco friendly. This is some great enginerring. Their light and easy to stack however I please, not dangerous like other heavy storage furniture that could fall on a child.