I watched a video about heat Heat
In the video it shows two liquids mixing together. The mixing of the blue and red liquid occurs due to the process of convection. As the matter is heated the convection process occurs.
The bending laser is where there is sugar water and regular water. How the laser bends is that it travels slower in the sugar water so if you move it quickly to the sugar water. Then you can see that it bends.
It is hard to be a sales man. You to design a cool toy that children would like to have and have a good presentation for the grown ups. You also have to get people to like your toy and have them vote for it.