Commencal Ramones 24 (kids bike)

Hi all,
I've bought my son a Commencal Ramones 24" (https://www.commencal.com/au/en/commencal-ramones-24-black-%26-white/21RAMONES24BK.html) for Christmas, I did have a Trek Precalibre 24 picked out but he likes the Commencal frame better.

Seeing as though the Ramones has a rigid front, would I be able to fit an RST first 24" suspension to this bike? https://www.bike-discount.de/en/rst-first-24-air-24-60-suspension-fork?number=20109401&__delivery=4

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Would it make much of a difference one this size bike, or is the alternatives I could fit?

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Thanks!