American artist Alexander Calder would have been 113 today, so Google has honoured him with one of its famed doodles replicating one of his trademark mobile sculptures.

The Google logo, designed with the blessing of the Calder Foundation, is made up of shapes (to represent the letters) that can be manipulated in order to gently spin them round, much like with a real mobile. The end effect is something quite transfixing - enough to make you forget what you were going to search for.

If you want to check out one of Calder's real life mobile sculptures, the Tate Modern in London and Tate Liverpool both house pieces, while the National Gallery of Art in Washington has a great example Stateside.

It's been a busy couple of weeks for Google Doodles, with designs commemorating Gregor Mendel and British architect Sir George Gilbert Scott both giving us a smile.

What's your favourite Google Doodle of all time? Let us know in the comments below...