Do you remember the joy and elation of building LEGO as a kid?

Or are your childhood memories more scarred by the pain of stepping on a stray block?

We all have a nostalgic memory of interacting with LEGO in some way.

And some of us may even have a LEGO shaped box waiting underneath the Christmas tree.

More than 220 million sets are sold around the world each year, according to LEGO, which actually works out as seven sets a second.