Because unlike a Lego set, atoms couldn't be snapped together in any arrangement you liked.

Users can buy Lego sets, as well as individual pieces.

The detailed nature of these sets requires a greater amount of design time than a normal Lego set.

More than eighteen million Lego sets were sold in 1968.

Lego sets have been on the market for so long that most of the company's employees played with them as children.

The figures can be described as a cross between an Action figure and a Lego set.

Almost all the blocks from Lego sets can fit together.

It was like playing with a Lego set.

Each found a pinwheel, a rubber ball, a Lego set and other toys.

The Lego set is number 7592 and has 205 pieces.