A common form of ride-on mower is the lawn tractor. The parade units often include miniature cars powered by lawn mower engines. The roller-drive lawn mower has changed very little since around 1930. The world's first solar powered robotic lawn mower was launched. Straight did not like the attention from the lawn mower trip. The first test with a lawn mower powered by an engine was done in 1947. Ellie explodes the fuel tank of a ride-on lawn mower, eliminating the soldiers. James Sumner of Lancashire patented the first steam-powered lawn mower in 1893. This was a mapping device for assisting surveyors that looked like a lawn mower. Bart falls asleep and attempts to find Willie, who appears as a lawn mower. The color green was chosen because the sponsor was a lawn mower producer. She did not, however, hide the keys to the lawn mower. It is well known now the time of innovation of lawn mower. Thus began a great expansion in the lawn mower production in the 1860s. "Prefontaine" is the fifth track off Madchild's 2013 album "Lawn Mower Man".