Where can you donate LEGO blocks

Many charity organizations accept complete sets. If you give them mixed up or incomplete sets, they will send them to the trash, and they will not decompose. City recycling programs sort them out, and dump them in the landfill since they are Type 7 (ABS) plastic. Legos are durable, and can be reused hundreds of times. www.brickrecycler accepts them and can even pay for postage if you are in the US. Another idea is you can sell via eBay (but shipping is really expensive at over $5 by USPS for just pound). There are Lego shows like: brickcon, brickfair, Bricks By The Bay, but they don't typically accept donations. They are set up for people to view Legos or buy. You could try to sell individual piece parts by using bricklink, but you need an account, patience, and rolls of stamps and stacks of padded mailers.