Then we thought about how blood moves around our body in big and little veins and arteries. I think it helped that you can see my veins through my skin.
To start the project we got some tape and created the outline of our body. This was a great opportunity to talk about proportions again. It was also a great mind stretching activity as it took quite a bit of effort for these little guys to abstractly visualize the outline of a body (let alone to make one out of tape). I was also able to slip in "linting" to our lesson teaching them how to attach slightly less sticky tape to paper to ensure it doesn't rip the painting when being removed.
Once our outline was done we began in the middle where the heart would be with a big dab of paint, then blew with a straw to move the paint around. I also encouraged the kids to tilt the paper and their little lungs got pretty tired pretty quick.
Obviously this is a creative piece so when kids started to experiment and mix colours or create blobs of paint in spots other than the heart I was not concerned.
I think in hindsight if I were to do this project again, I would have them draw or tape off the shape of a heart instead. Or they could collage a cut out heart onto of the finished blow painting too.
Either way it was a great messy project that the kids loved!