After legal advice the chairman of the bench said the boy was "required to sign on the Sex Offenders Register" for two and a half years, half the required period of an adult.
The boy, who cannot be named for legal reasons, will join 29,000 people on the Sex Offenders Register in the UK, which came into force in 1997 and includes all sexual crimes.
Mr McCormack, defending, said today: "The appeal will be on two grounds.
"The first will be whether the defendant should have been regis-tered on the Sex Offenders Register and whether the court interpreted the law correctly.
"The second will look into the question of sexual intent or motive.
"The recent legislation in the Sexual Offences Act 2003 tends to suggest that intent is irrelevant on deciding whether the offence is committed.
"This would have wide ranging ramifications for the very young."
A spokeswoman for the Crown Prosecution Service said: "In my experience I've never come across someone of this age having to sign the Sex Offenders Register.
"It's unusual for someone of such an exceptionally young age to be put on the register."