Two science-oriented magazines from this part of the world for younger readers.
One for 7+, one for 10+.
Readers are welcome to share other possibilities in the comments below. (Adults reading, too, even!)
Scientriffic

Curious little scientific minds can dig into Scientriffic.
Published every two months, it’s a production of CSIRO Education intended for those from 7 years old, upwards. There’s stuff on the website, too.
To get the magazine readers join the Double Helix Club. The subscription form has a rate for those from overseas. New Zealanders ought to also find it in local libraries.
The magazine is a mix of short ‘articles’ ranging up to a full page and a few longer ones as centrepieces. As you might expect it’s (very) brightly coloured and includes experiments, quizzes, puzzle, a cartoon strip (in the reviewed edition, Midge Bristol Investigates) and competitions.
There’s content from readers too. One page features calls for penpals. Another includes book reviews by kids – in the edition I’m reviewing these are by kids ages 9, 10 and 13, one being of Kitchen Science Experiments: How Does Your Mold Garden Grow?
Helix

For the slightly older reader, aged 10+, there is Helix.
I don’t have a physical copy of this at hand to review, but the sample articles and sample feature articles from the website show that Helix adds more details, depth and science-y flavour.
Like Scientriffic it’s published every second month and can be ordered online by joining the Double Helix Club.
Afterthought
I haven’t encountered a New Zealand counterpart to this initiative to publish, in print form, science-orientated material for younger readers – does anyone know of one?
Other reading material on Code for life (these mostly for adults):
Teaching kids critical thinking
What books do you think geeks should read?
Free books: basic statistics, evolution and origin of man

Would Junior Skeptic count?
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