You show up with two bags (preferably opaque). EACH bag is to contain 20 basic bricks. This can be anything from a 1x1 up to a 1x16 or 2x10. They can be all one color or mixed colors. But they can't be slopes, facet bricks, or inverted bricks.

EACH bag is also to contain 80 elements that are not basic bricks. They can be anything at all, plates, minifig pieces, support elements, Galidor parts, wheels without rims, etc. It should be parts that you value the least in your collection and stuff someone else will probably have a hard time building with. They DO have to be real LEGO elements.

No pawning your knock-off brand pieces on someone else. Pieces are also to be in good to new condition (no cracked, broken, chewed, written on, or melted pieces. The pieces will be counted the way they come out of the poly bags in a set. For instance: you could put in a minifig torso with its arms and hands intact but you couldn't put in just hands, torsos, or arms because when you received them in a set they were already connected, so they only count as one piece, not five. Because of this, some hinge elements can be given as only a ball joint but not other ball element. In the 80 pieces no particular element can be repeated more than 10 times, regardless of color. So you can't give someone 80 1x1 plates, just 10 at the most. But you could put 10 1x1 plates in each bag if you so wished.

During the event both of your bags will have a ticket stapled to them. The other half of those tickets will be placed in a bag. We'll randomly select someone to go first because it really doesn't matter. The person who draws the first ticket will receive that corresponding bag. The person who just had their bag drawn will then be the next person to draw a ticket until all the bags are exchanged (hence all the tickets are drawn). In the event that you draw your own ticket your stuck with your own crummy pieces.

The bags that you receive you are now stuck with. You now open the two bags, combine the pieces and start building something, anything. It can be a house, car, spacecraft, sculpture, or whatever you can come up with. You can use as many or as few of the 200 pieces as you wish. The "creations" will then be collected and displayed the following morning. The creations will be judged and a winner announced at the awards ceremony.