Girls just want to have fun!
That's why on Monday, the two social media queens — and several friends including Harry Hudson — took a school bus to Legoland in Carlsbad, CA!
The 18-year-old and the 20-year-old enjoyed the theme park's roller coasters, live shows, and of course, legos!
But the fun didn't end there! Afterward, the KUWTK stars paid a visit to grandma MJ in San Diego! Family comes first after all.
We are so glad the Jenner sisters had a great time, and we can't wait to see more of their adventures!
To see clips of their day trip, ch-ch-check them out (below)