Jaden and Willow Smith: Siblings That Shred Together ...

Is there anything the Smith siblings can't do?

Jaden and Willow channeled their inner Laird Hamilton hitting the beach in Hawaii.

The 19-year-old and his 17-year-old little sis were caught catching some waves as Willow's rumored boyfriend, Tyler Cole, and a friend looked on.

Ah ... to be young, rich and fearless.