Two budding Seattle scientists are making a name for themselves after sending a homemade spacecraft 78,000 feet above the Earth's surface on Saturday.
Sisters Rebecca and Kimberly Yeung are 10 and 8 years old.
In a video posted to YouTube by their father, Winston Yeung, the girls explain their experiment, which they called the Loki Lego Launcher - after their cat. A cutout photo of Loki hitched a ride on the craft, along with a LEGO figurine of R2-D2.