Anyone may participate with a $30 fee, online application and a photo of their sandcastle creation. The deadline to enter is July 6. Information, instructions and application may be found at www.roundhouseaquarium.org/sandcastle. The online voting period will commence on July 9 through July 18. A donation of $10 is requested to cast a vote. The entries that garner the most votes for each of the following categories will win a prize: High Tide – Best overall sandcastle Seasational Splash – Best ocean-themed sandcastle We Otter Stick Together – Best team spirit Creative Claws – Most creative sandcastle For more information about the event and to see important dates, go here.