In case you haven’t heard yet, we have a lot of expired medical-grade polyurethane. The Powers’ family were interested in learning how to make and pour a mold, so what better than LEGOs!
The negative mold was made by placing lots of LEGO bricks on a building base, then surrounding the base with a lip of LEGOs to keep the polyurethane from running over. The polyurethane then created the negative of the LEGOs, preparing a cavity in which to pour gelatin to make gummy LEGO bricks.
You can see the base mold (yellow, on the table) and the finished LEGO bricks here:
If you’re not up to the challenge of building your own mold, there are plenty online 