Simple watercolour idea to do with the early years. You can use a template or a hand drawn sketch. Draw your design on watercolour paper, paint around your design using water. Then gently drop paint  water and using a mixture of, in this case blue and green water colour paint (pigments) the paint will blend into each other and create a lovely watery background!

Here are some more instructions

http://www.activityvillage.co.uk/dolphin-watercolour

Click here below is a dolphin template

http://www.firstpalette.com/tool_box/printables/dolphin.pdf