Student membership comes at two levels - Basic and Premium. The latter only costs 10 euros a year. Apparently, most of this fee goes back to the English Chess Federation (assuming you're English!).
Click here and then go to 'Registration'.
If you don't have a FIDE number (most juniors don't) then you will need to go for Basic membership first. You will then be given a number which you can then use to upgrade to Premium membership.
There are several benefits available for both types of membership. At the Basic level, you get a monthly newsletter and a membership card. At Premium level you get a 'Student' rating, a weekly newsletter, a free gift (?) and access to a website which has various training resources.
I will be interested to hear if any Suffolk juniors take up this offer.