Here they're weird with strawberries even at 2 and 3 yrs!
I gave raspberries very early - definately from 7-8mths with Emma (they were in season then, its how I remember ;-)
Strawberries I gave probably a lot later - she was 1.5, O was around 14-15mths, again just because they were in season and the kids were too young a year earlier...
S x