Science with cats

Science with cats is my recently launched project on teaching children basics of science explained on a simple way using hand drawn cats. The projects is expected to appear in chapters, each of them explain some physical phenomenon that is really common for everyday life but has an interesting science background. Each chapter appears on a web page as a set of pictures and also as a pdf document that is simple to download for future use. Moreover, additional explanations are available.
All chapters might be used in educational purposes, but it is compulsory to mention the author. Any changes into the chapters or pictures should be discuses with the author first. First chapter can be found below.

PDF version is available for download here. Additional explanations are about to be published in a next few days.