Chinese artist Ai Weiwei has said a change in policy by Lego to allow bulk orders of their toy bricks for projects with a political purpose is a victory for freedom of expression.

The Lego Group last year refused a bulk order for the toy bricks for an exhibition of Ai's in Melbourne, Australia. Ai called that move "an act of censorship and discrimination," but Lego said it had a decades-old policy of not endorsing the use of its bricks in projects with a "political agenda."

On Tuesday, it announced it will no longer ask what the "thematic purpose" of a project is. Instead, customers who intend to display their creations in public will be asked to make clear that Lego does not support or endorse them.