Masks and vaccinations are recommended. Plan your visit
Artist Scott Weaver has spent over 40 years painstakingly constructing this replica of the city of San Francisco out of toothpicks. Ping-pong balls added here or there wind their way through the model, visiting various famous sites along the way.
Where: Gallery 2: Tinkering
Soap film hits the big time at this exhibit, featuring a giant square soap bubble the size of a picture window. The cascading colors you see here arise from overlapping light waves that reflect from the front and back surfaces of the soap film—a phenomenon called interference.