A new exhibition in Houston, Texas, is featuring art you can't see -- at least not with the naked eye.

Visitors must use microscopes to get a glimpse of the tiny wonders since the sculptures are smaller than the size of a "period." The art work can fit in the eye of a needle, or on the tip of an eyelash.

Artist Willard Wigan, 52, of Birmingham, England, says it takes more precision than that of a surgeon. He even works at midnight to prevent vibrations from passing traffic.

Willard hopes his work will teach kids to dream big and to never underestimate the small things in life.

"My mother taught me that the smallest things can have the biggest impact," Wigan told National Public Radio.