The instrument that looks like a sweet potato is the sitar.
The sitar is a long-necked, fretted string instrument originating from India. Its distinctive gourd-shaped resonating chamber, called a tumba, is often compared to a sweet potato in shape.
The sitar is a popular instrument in Indian classical music and is known for its rich, complex tone. It is played with a plectrum made from a piece of coconut shell or metal, and the strings are plucked to produce a variety of melodic and rhythmic effects.
The sitar's unique shape and sound have made it a recognizable and beloved instrument worldwide.