FARGO — Three local girls are serving lemonade with a side of martial arts. The Donahue sisters are raising money for a trip to Texas in order to compete in a martial arts competition. ADVERTISEMENTThey are selling lemonade, cookies, caramel corn and other baked goods. The girls are with Red River Judo and have been learning martial arts for two years. The Donahues will continue to sell lemonade over the next couple weeks.