Police say the boy, who has automatic name suppression, sent threatening emails to several organisations, including the Department of Corrections and Southland Boys' High School.
The teenager appeared in the Invercargill Youth Court on Tuesday after being arrested on Monday night and charged with two counts of threatening to do grievous bodily harm/threats to kill.
His arrest followed an investigation by police into threats sent to educational and public sites across New Zealand.
Sergeant Brett Cronin told the court police were "strongly opposed" to granting him bail.
But Judge Catriona Doyle granted bail with special conditions.
This included a check-in to monitor bail compliance on June 5.
The teenager would then reappear at the Invercargill Youth Court on July 3, when he is expected to enter a plea.
Bomb threats
There have been several bomb threats to Auckland educational and public facilities in the past week.
Auckland Art Gallery was evacuated last Thursday morning after receiving a threatening email, which gallery director Dr Zara Stanhope later described to the Herald as a "hoax threat".
Staff and students at Kiwi College in Albany self-evacuated after an employee received an email with a bomb threat last Tuesday morning, with police attending and clearing the address.
That email said explosives were planted inside the building, and allegedly threatened, "you are all going to be blown into bloody chunks".
Finance manager Jay Cheng told the Herald the threat allegedly claimed the Kiwi College facility was "rigged with 22 pounds of C4 explosives".
