Saturday & Sunday, July 5 & 6:  Kaua`i Kau Wela Summer Festival. The event begins Saturday at 10 a.m. at Kukui Grove Mall, Center Stage, 3-2600 Kaumuali`i Hwy, Lihue, featuring Hula and Tahitian dance competitions, Live Tahitian drummers, entertainment, and Polynesian Crafts and displays. Sunday 10 a.m. to 3 p.m., the ukulele competition will be held at Kamokila Hawaiian Village, 580 Kuamo`o Rd, Kapa`a. Gates open 9-5 p.m. $10 adults, $5 children 3-12 years old.   At 11:30 a.m., Wa`a kaulua,…