Mrs van Rensburg said it was like winning lotto when she was selected from 1000 applicants worldwide to watch the SpaceX/NASA CRS-7 launch in June in the US.
The mother of two was the only Australian in the group of 50 chosen to see the launch and one of four who was not American.
Mrs van Rensburg said the experience was "amazing" and included a behind the scenes tour of NASA.
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READ NOW"I was able to see the Boeing docking system for the International Space Station, material that does not burn even if you put a blow torch to it and I was able to hold something that was well over 200 degrees Celsius without burning myself," she said.
�I saw how they grow veggies in micro gravity, I was able to be in the Vehicle Assembly Building where they built the shuttles (which were also used in the Transformers movie), I was part of the questions and answers sessions and was on NASA television.
"It was one of those moments in your life which you are so grateful for experiencing but also know it was like winning lotto."
Mrs van Rensburg said it was ironic that she was called a space cadet at school because she now could qualify herself as one and be proud of it.
"I used to look up as a kid and wonder what is out there," she said.
"Of course I used to imagine travelling through space wondering what the planets looked like."
To ignite the same enthusiasm among other children, Mrs van Rensburg founded SpaceTripreneurs to educate and prepare the next generation with skills for the future and space travel.
"We want to impact one million children through SpaceTripreneurs by 2020," she said.
�We host fun; exciting and innovative classes that teach skills which kids can transfer to their lives now, to their schools and can be used later in life.
�Our latest class allowed kids to transform their old broken toys into basic robots.
Mrs van Rensburg said she planned to develop a relationship with NASA.