Tiger Woods and Lindsey Vonn take Sam, 5, and Charlie, 4, jet skiing during Memorial Day Weekend in Jupiter, Florida on May 26, 2013. Credit: WENN.com

Over the river and through the woods, to Tiger's house they go! Tiger Woods and girlfriend Lindsey Vonn got into full-on summer mode over the long weekend, taking Woods' two kids -- Sam, 5, and Charlie, 4 -- out for a ride on a pair of jet skis on Sunday, May 26.

The foursome looked like they were having a great time as they rode the motorized water vehicles through the water by Woods' Florida home, with Sam sitting in the seat in front of Vonn and Woods keeping a protective arm on son Charlie.

But Vonn's new role in Woods' tiny family unit isn't all fun and games. The Olympic gold medalist skier, 28, has also been taking on school duties, walking the kids to and from school with their lunches in hand.

On Tuesday, May 21, the couple were spotted taking the excited, uniform-clad kids to school in North Palm Beach, Fla., and one day earlier, Vonn even took them to school solo.

Woods, 37, and Vonn first announced their relationship status via Facebook in March, sharing professionally shot portraits along with a note about how their friendship had blossomed into something more.

"Lindsey and I have been friends for some time, but over the last few months we have become very close and are now dating," Woods wrote in the post. 

Earlier in May, the pair also made their big debt at the annual Met Gala, where Woods got a bit tipsy and embarrassed his athletic girlfriend.