This Sunday, the town of Frisco will be hosting its annual sandcastle building competition at the Frisco Bay Marina. As in years past, the contest is mostly restricted to contestants aged 12 and under. Competitors will have from 10-11:30 a.m. to build their sandcastles, and are encouraged to bring their own sandcastle building supplies or decorations. Prizes will be awarded to the first-place overall sandcastle, as well as first, second and third places in each age division. For more information, visit TownOfFrisco.com .