It is hard to give a grandmother something that she really likes. Grandmothers do not care about iPhones or iPods. Grandmothers do not watch latest movies and do not care about hop pop-stars.
Grandmothers know nothing about fashion brands and will not appreciate even if you give Prada purse. They will fill this purse with mint candies and chocolate bars and don’t care to ruin it. So, you should not spend much, but you expected to give a lot.
Give her something she really likes about someone she really cares about. I gave mine a photo cushion with a nice picture of her favorite Prinkles (the small and nasty dog of hers), supplied by http://umadeup.com .
She was pleased, I was satisfied.