The soft toys MAT and KMS were named after the first initials of the pupils who helped make their space suits.
Along with their two intrepid colleagues, they were strapped to a beam attached to a foam-padded box containing instrumentation and cameras on Monday.
After rising to an altitude of around 100,000ft, a webcam caught their 'space-walk' for posterity before the helium balloon burst.
They then fell to Earth before a parachute opened automatically to provide a soft landing.
Link -Thank, Charles Hog!
(image credit: Cambridge University)