Shawn Wayans used his sense of humor to end a tot tan trum at Pinkberry in LA the other night. Wayans’ daughters, Laila, 10, and Illia, 6, and son Marlon, 3, had just ordered frozen yogurt when Marlon dropped his on the floor and burst into tears. Wayans tried to comfort him with a re placement. But our spy reports, “Marlon pointed at the floor, saying, ‘I want that one!’ ” So Wayans “scooped up a dollop of the fallen yogurt and broke into a silly dance for his son.” Wayans handed his own yogurt to the giggling boy and said, ” ‘Come on, guys, let’s go.’ And they all . . . walked out with big smiles.”