Hi Poli,
If you can scan it again at a higher resolution, it might be possible to get an improved picture...there seems to be some interference or something on the current scan, there are lines across it which look to be some artefact from the scanning process. See if you can get your daughter to scan at 600dpi, and then resize the picture until it's under 500kB. Then post it, and we can have a look!
Prue