What you decide to purchase in the end is up to you but how much you can afford to spend will determine what you can buy. But a good all rounder like a 24-70mm eg Tamron a bit dearer could be a good start along or a 35mm f/1.8 or 50mm f/1.8 and builds on what your daughter already has . These are good lenses but are lower in value but always handy to have. When you have considered a particular area of interest then you can start to be more specific with a particular lens and save the $'s to afford it in the mean time