Interesting option Dave. I have a lad in our under 13s who does just what that girl did, virtually all top spinners but very acurate (for youth cricket) and finished the season with 16.5-0-49-5, generally as our first change bowler and I would guess at least 20 of those runs were where he tried to bowl something different, particularly at the start of the season. I think in time his 'variation' is more likely to be a change of pace rather than a real ripping leg break as it looks too different, but will see how he goes.