You can donate your used legos to back to LEGO for a good cause

LEGO has decided to team up with Give Back Box to make a difference in kids lives. The social enterprise will steam clean legos and repackage them by the hand. The toys will then be given to Teach for America and the Boys and Girls Club of Boston. 

If you live in the US, you can print a free shipping label 

LEGO is committed to reducing their carbon footprint. They invested in wind farms which now prodúce more electricity than it uses at its factories, offices and stores. By 2030, lego has also committed to making their toys out of plant based plastics or recycled materials instead of petroleum.