Plain yoghurt is such a strong taste, I think it is unusual to find a lo who does take to it. You could try mixing it with fruit purees, but neither of mine would take it. If you want your lo to take yoghurt, you are probably better buying children's flavoured yoghurts - if you are worried about the sugar (which you don't need to be as part of a varied diet) you can check the labels for the ones that have the least. I think some of the organic yoghurts have slightly (but only slightly) lower sugar levels that the others - beware, though, the ones with TV characters tend to have much higher sugar levels.