Many of his larger pieces are on display at the Vollis Simpson Whirligig Park in Wilson, North Carolina, about 10 miles from Lucama.

[5] Simpson served in the US Army Air Corps during World War II in the Pacific Theatre.

[1] He demonstrated his intuitive engineering skills while stationed on Saipan in the Northern Marianas Islands, where he constructed a windmill out of parts from a junk B-29 Superfortress bomber to power a washing machine for his company.

[6][7] After the war, Simpson founded a house-moving operation with his brothers to supplement the income from the family farm.

He designed and built much of the heavy equipment they used to move houses, creating a first of its kind crop sprayer.

This was referred to by locals as "Acid Park" because of how the sculptures would reflect car headlights when people came out after dark.

The 55-foot (17 m) high, 45-foot (14 m) wide whirligig called "Life, Liberty and the Pursuit of Happiness" was installed for the museum's opening in November, 1995.