Within an hour or so some of the inner petals started to change colours, especially the green dyes which seemed to be the strongest. The children were really excited and they thought the water was travelling up into the flowers and out to the petals, changing their colour as it went. Kitty described the stem as being like "a straw". The first changes were seen in only about 10 minutes. By the next day or two the colours had reached most of the petals on each flower and looked very effective. We noticed that the purple dye made the petals blue, not purple, and talked a little about how colours are split and combined in dyes.
In order to do this you need: a few stems of bright, white flowers such as chrysanthemums, gerberas or carnations
some jars filled with water and various shades of liquid or gel food colouring Colour the water in each jar, and simply place the flowers in, watch and wait! I asked the children what they thought might happen and they guessed that the flowers would change colour. The next question was how long did we think it would take. I had three colours, Green, Red and Orange and one jar with just plain water as a "control"
Magic Flowers... This fun experiment is suitable for children from 3 - 10 years.
This classic, fun activity was always one of my favourites to do with the kids when I was teaching Reception classes and produced a WOW reaction each and every time! It effectively demonstrates how plants transport water up the stem, via the xylem, to reach the leaves and petals and hydrate them. The brightly coloured water changes the bright white flowers in a short space of time and that again makes it perfect for little ones who don’t have too much patience for drawn out experiments!