Monaco's Prince Jacques and Princess Gabriella Provide Aid to Marine Wildlife on Their 8th Birthday

Happy birthday, Prince Jacques and Princess Gabriella!

Monaco's royal twins turned eight on Saturday and celebrated their special day by learning about and providing aid to marine wildlife while attending an ecological event at the principality's Oceanographic Institute.

Joined by their mother, Princess Charlene, and father, Prince Albert, both Prince Jacques and Princess Gabriella prepared a package of juvenile turtles, which will leave the museum to join the Turtle Village of No Flay, Senegal, the palace said in a Facebook post.

In photos shared online, Prince Jacques and Princess Gabriella can be seen excitedly holding onto the sea mammals, while also helping to decorate the crates the animals will be shipped in.

Later in the day, the twins took part in a party with their parents, which featured various cartoon characters — including Kung Fu Panda, Sonic the Hedgehog and Mario. Princess Gabriella was dressed as a geisha, while Prince Jacques was captured in formal attire.

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To celebrate the children's birthday, Princess Charlene, 44, shared a video on her Instagram account that features a montage of her kids.

Made up of some never-before-seen pictures, the video shows the twin royals attending sporting events and enjoying family trips in-and-outside the principality.

"Happy Birthday my loves," Charlene captioned the clip, which is set to the tune of Tim McGraw's "Humble and Kind."

Prince Albert, 64, recently told local newspaper Monaco Matin that his twins "are very close, very much accomplices."

"They will be 8 years old, they are still young but progressing a lot in terms of maturity and awakening to the world," he added. "It is amazing for any parent to see their children grow up."