making cool new things out of discarded HDPE
https://www.youtube.com/watch?v=fQ-u1wXUiP8
https://www.youtube.com/watch?time_continue=13&v=kUR6_bQLU-E
best idea:
1.) get a lego brick 2.) make a concrete mold of it 3.) mold a bunch of legos 4.) get an ink pad 5.) ink the studs of one lego onto the bottom of another 6.) use this as a guide to drill holds on the bottom to receive the studs
actually just do this in a plaster mold: http://www.instructables.com/id/HomemadePlastic/