This is an extremely useful addition to any Lego collection.
Not only does it hold bits of Lego still making them easier to be added to, it encourages 3-D building for children who have a tendency to build 2-D 'towers'.
Can be linked together with other plates of the same or different colours to create towns, beaches etc. and stretch young imaginations.
Also very useful when you are putting Lego away. Just stick all the blocks onto the board and you have a solid lump of Lego, reducing the loss of small parts.