Dr Masaru Emoto (1943 – 2014) was a Japanese researcher who claimed human consciousness has an effect on the molecular structure of water.
One of the experiments he did was to place different written words on water and to note the effect it had on water crystals as seen in the following video:

From his experiment, it can be seen that different words and their intention have different effect on the structure of water crystals, with words such as, Thank You, Love, Compassion, Truth, Peace, Love & Gratitude, Humility etc creating beautiful crystal structures and unkind words creating distorted, non-symmetrical dysfunctional crystal structures.

If words can do this to water, imagine what words can do to us as the majority of our body is water.
Dr Emoto was passionate about sharing this knowledge with children and authored two children books, “The Secret of Water for the Children of the World” and “The Message from Water” children’s version, which was printed in over 75 countries and is available free of charge on his website.  http://www.emotopeaceproject.net/picture-books/4584092537

Please download his children book at the above link, which beautifully illustrates to children the power of their words and intention and encourages them to show love and thanks to themselves and others.

“Words are the vibration of nature. Therefore, beautiful words create beautiful nature. Ugly words create ugly nature. This is the root of the universe.”

– Dr Masaru Emoto