The Tree in a Test Tube

The Tree in a Test Tube 1942 is a short film produced by the U. S. Department of Agriculture and distributed by the U.S. Forest Service, featuring Laurel and Hardy, with narration read by MGM announcer and producer Pete Smith.

The Tree in a Test Tube is Laurel and Hardys only known surviving color film with the exception of brief color home movies of the duo performing on stage in England and a visit with one another back home in 1956, their final filmed appearance, shot in Kodachrome on 16mm, and is basically World War II propaganda. The Rogue Song 1930, made in Technicolor and featuring the duo in their only other known color footage, is now considered a lost film, although a number of fragments have survived.Their routine lasts around five minutes and was shot silent their voices are not heard. The second half of the film is unrelated documentary film footage. Laurel and Hardy shot this brief film during their lunch hour on the back lot of Twentieth CenturyFox on November 29, 1941 and the film went into release in spring of 1942. ........

Source: Wikipedia