The aunt's post warned other families to be cautious and "help us catch this person". She pleaded for anyone with information to contact police.
The post had been shared more than 250 times.
Linton Camp School principal Geoff Franks said the school was informed of the attempted abduction.
"Yes we are aware and yes we will be talking to the kids, like we do every year."
He said the school was unable to comment any further.
The police spokeswoman said a statement would be released to the media if any further help was needed from the public.
The New Zealand Defence Force (NZDF) said police were in charge of the investigation so was unable to comment.
A "stranger danger" meeting was held for families in the Linton area last night.