"Lego has also expanded its brick takeback programme, Replay – where consumers can donate old bricks to the company through free shipping – into the UK and cont

"Lego has also expanded its brick takeback programme, Replay – where consumers can donate old bricks to the company through free shipping – into the UK and continued to test similar models in the US and Europe." I wonder what they are doing with the old bricks. "testing more than 600 alternative materials." does anyone have a list of the materials they tested? It would be interesting to see what sorts of directions they where going.