When you’re a grown man crouching on your bedroom floor, however, disbelief can be a little trickier to suspend.
But teacher Jon Chippindall and his best friend Ian Cunningham have found a solution – by sending Lego models of themselves to the outer fringes of Earth’s atmosphere.
The self-confessed science geeks, from Manchester, spent £250 to propel a high-altitude balloon containing the figures and an HD camera to a height of 27km.
The strapping on Mr Chippindall’s avatar became loose – sending him on an impromptu spacewalk.
But both ‘astronauts’ landed safely on farmland near Chesterfield, 75 miles from the take-off point in Mold, North Wales.
‘We were able to video the journey, so with the characters on board it was almost like we were in space,’ said entrepreneur Mr Cunningham, 29.
The pair are writing a guide on launching probes.
‘It could really inspire kids,’ said teacher Mr Chippindall, 31.