It takes hours of meticulous setup, and two minutes to topple, but there's something mesmerizing about watching dominoes fall.
At the Maryland Science Center, they're going all out to impress kids and parents.
Saturday is their annual Domino Day! The science center says they are going to knock over 35,000 dominoes in a display that honors Maryland geography, landmarks, and wildlife.
You will see everything from the Ocean City boardwalk to the Bay Bridge, and of course a crab!
The topple will start at 2:00 p.m.