Sentence:  The 24-year-old competed in his first race at MIS in 2016 in the ARCA Racing Series, finishing 17th. His family sold all their dwarf cars, <WSD>mini-cup</WSD> cars and go-karts Baird raced in his young career to go after sponsorship to race in the series. 
Meaning of the word marked with <WSD> tags:  miniature racecar.