Why have a circular tray unit?

When I was first introduced to the circular tray units, I thought yes they are great to look at but what are the uses. I had taken my 2 year old son along to the launch of the tray units and soon found him opening up drawers and putting his thomas the tank engine in them, he was lifting the trays out with ease as the trays are a triangular shape which seem easier and lighter to manage then the traditional rectangular tray. The way that they had arranged the units into clusters with semi circular with rectangular units making them a great way to double up as a display unit. I do believe that these units will become a favourite not only for my son but for schools up and down the country. If you would like to view the circular units please click the picture.