The exercise of blowing the bubble encourages children to practice deep breathing which has calming effects on the body. The activity of blowing bubbles is also good for strengthening muscles in the mouth.
How to make bubble paint
Put a squirt of paint and a squirt of washing-up liquid into a container. Add a little water and mix well until the mixture is runny enough to blow bubbles with. Using the straw, blow into the mixture until the container is so full of bubbles that they rise above the top rim.