The nicest way is to use a Google account [free] , and upload your photos to Google+. If you use the standard filesize, all pix are free to store. Then use the Google+ Slideshow Feature, as you use the Google Cast Extension casting function.
Explain that water is made up of tiny particles, called molecules, which are too small to see. These particles are always moving, even in very cold water. Since water molecules move, the molecules help mix the food coloring. However, the color mixed faster in the hot water than it did in the cold.
What is Brownian Movement. What Brown observed was that the motion within pollen grains (suspended in water) seemed to move around the liquid seemingly at random. This intrigued him and he began to study why this was happening, and tried to establish what force was driving these random fluctuations and changes in direction.