Judge Gregory Ross gave Henson his first warning under the three strikes legislation.
He said the charges now meant he was obliged to give Henson a warning about the consequences of another "serious violent" offence.
Judge Ross then remanded Henson in custody. As he was led out of the dock, a member of the victim's family shouted, "Brendon, Brendon, you f****** a******, c***."
Pre-sentence and reparation reports were also ordered.
Henson was arrested in Rotorua a week after he snatched the child off Shamrock Street about 8.30am.
An extensive search was immediately launched for the girl, whose name is suppressed. She was found two-and-a-half hours after she went missing on the other side of town near Hind Place.
Resident Bill Gilliland said he found the girl distressed and took her to a neighbour's house who phoned police.