Simplify the following text for a Grade 7 native English-speaking person.
Original: Infrequent wind gusts can cause poorly designed suspension bridges to sway . When wind gusts are at a similar frequency to the swaying of the bridge , the bridge can be destroyed more easily , such as what occurred with the Tacoma Narrows Bridge in 1940 .
Simplified: Sometimes gusts of wind can make poorly made bridges move or be destroyed , like the Tacoma Narrows Bridge in 1940 .