When water moves up a spongy fabric (or a plant’s stem) its called cap­il­lary ac­tion.

Kids Go Gardening - - News -

Place some white flow­ers in coloured dye and watch what hap­pens. You can make a good strong dye us­ing food colour­ing and water. For an ex­tra cool ex­per­i­ment, split a stem down the mid­dle then dip one half in water and the other in coloured dye.

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