I do this project a lot with my class and the results are always great! Works for cards, wrapping paper or just a nice picture in a nice frame.
1
This is what you need: Paper, drikning straw and water-based drawing ink in different colours.
I don't know in how many colours they come but I have green, blue, black, red and yellow.
2
Put a small amount of ink on the paper, less is more..
3
Start blowing the dot of ink around with the straw but don't put saliva in the ink:)
4
If you make circular motions with the straw while blowing, you get a tree/vein effect. Pretty neat.
5
Add more colours in and when you are happy with your picture you are done!