DD (14) temporary hair dye

[WingMirrorSpider]

14 yo dd wants to dye her hair for the summer holidays. She wants it one of the pastel shades (pink, lilac or turquoise) so needs it to wash out within 6 weeks.

Her hair is dark blond. I understand for best results she'd have to lighten her hair first, but has anyone had any success without doing this? Are there any brands you'd recommend?

TIA X

If you bleach her hair to lighten it and put a semi permanent pastel colour on top, it will take ages to wash out and will never completely leave her hair.
A compromise would be to dip dye just the ends, which can be trimmed off after the holidays. It's not that difficult to achieve at home. I would recommend Schwarzpof LIVE lightener + twist in pastel rose or lilac. This would lighten and tint the hair all in one go.

Alternatively, she could try hair chalk which is wash out, available in Boots.