Domino toppling

Techniques employed in domino toppling may include three-dimensional structures, spiral formations, letter shapes, and the integration of Rube Goldberg machines.

Large-scale arrangements can consist of millions of dominoes, designed to take several minutes or even hours to complete their fall.

To manage the risk of premature toppling, builders may incorporate special blockages, known as firebreaks, at regular intervals within the arrangement.

These firebreaks serve to contain the collapse to specific sections, allowing for the removal of blocks without damaging surrounding tiles.

The first public domino shows were organized by Bob Speca, Jr. from Broomall, Pennsylvania, in the United States.

[1] That event, and his appearance on The Tonight Show[2] triggered a domino-toppling craze, leading to a long lasting competition among domino-builders about the world record.

Since 2015, The Incredible Science Machine, an international event involving multiple teams, has been held annually in the United States.