Import Products - Painfull? - Please help

I would like to do bulk product imports but most painful part is product features documentation in CVS file. Is there any easy way to document & upload product features especially electronics product?

Could you please advice best way to document product features in CVS file for product import?

{25}(Toys Features) Toy Brand: S[Bloks]; {27}(Toys Features) Toy Age Group: M[4 - 15 Years]; {23}(Toys Features) Recommend Age Group : S[4 - 15 Years]; {24}(Toys Features)

Please PM for help