Well done. Really nice set of photos.
My biggest quibble is with the leaping photo (which is also my favorite) where it seems the flash was aimed too low -- more at her tummy than her face. For now a bit of post-processing would probably fix that.
As far as working into the sun, remember you can damage your eye looking at the sun through a camera. (To answer the post above, it is very unlikely you would damage the sensor on a DSLR as it is behind the mirror and shutter except for the moment of exposure.) If possible I would pre-focus and lock in without the sun in the frame, then shift to the final composition. Flare is always an issue, you just have to hope it works out, else or put in the extra post-processing time to get rid of it.
Keep up the good work.
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W.Mann