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The 10th Annual Tech Topple: July 13 to July 19
The Largest Live Domino and Machine Build in California
Think Outside the Box!
The Puzzling and Mechanical Escape Room
It’s back and bigger than ever. The Tech Topple 2025 returns to The Tech Interactive for its 10th anniversary with a jaw-dropping kinetic build: a giant escape room made entirely of 50,000 dominoes and 250 chain-reaction machines. This year's theme, “Think Outside the Box,” transforms an immersive puzzle adventure into a spectacular chain reaction—designed to solve itself, then collapse in one breathtaking cascade.
From July 13-19, the Reactica crew of 15 expert domino and machine builders, will spend a full week building, tinkering, and puzzling their way to the biggest domino topple California has ever seen!
The Big Topple: July 19 at 1 p.m. sharp
One push. Total chaos. Extreme satisfaction. Be there or be square.
Watch the Build Progress All Week Long!
The crew of domino masters will spend a full week constructing an intricate series of puzzles using 50,000 dominos and 250 machines that will solve themselves when toppled. Drop by anytime during museum hours between July 14-19 to see their construction in process, talk to the builders, and watch the magic unfold.
Don’t Miss The Big Topple!
Be sure to join us at The Tech Interactive on Saturday, July 19 for the ultimate destruction. You’ll want to see the action in person to see if the build team can make chain reaction history. The topple starts at 1 p.m.; seating is first-come, first-served; and the experience is included with admission!
Build Your Own!
The Tech Interactive is your domino HQ all week long, with hands-on workshops, live demos, and special events you won’t want to miss. Learn the tricks of the trade from the pros and discover the science, art, and satisfaction behind every topple.
Domino Distraction in Tech Studio
July 1-27
In preparation for Tech Topple, come practice your domino-building skills with three tables of different domino design challenges. Ages 5+; under 10 accompanied by an adult.
DIY Domino Characters in Tech Studio
July 13-19
Be part of the domino action! Make your own domino character to be incorporated in The Tech Topple.
Domino Workshops w/ The Pros
Member price $10 per person, Non-member price $15 per person
Join a hands-on workshop led by domino and machine-building experts from across the country. You'll learn pro-level tips, take on creative chain-reaction challenges, and build like a true master.
This is a can't-miss chance to build alongside the pros! Seating is limited, so reserve your tickets now!
Sunday, July 13, 3-4:30 p.m.
Tuesday, July 15, 1-2:30 p.m.
Thursday, July 17, 1-2:30 p.m.