Need your valuable opinion on my query relating to vat/cst

Hello,
I need you valuable opinion on my query relating to VAT/CST.
We belong to an educational organisation where we provide educational services to students by way of self preparatory video lectures in DVD that we sell online and on this we charge service tax.
Now, in addition to this, we wish to give them one stationery kit comprising of notebooks, pen, pencils, eraser, sharpner, ruler, motivational poster, one T shirt & cap which will be optional & who so ever student want to book this will have to pay a fixed amount extra.
Whether, there will be any incidence of VAT/ CST in this case & if yes, what can be the alternate way to provide this option without any incidence of VAT/CST.
Please advice.
Thanking you