Magic coloring Book small

Here is the little magic book with color apparition.
Flick through a coloring book in a natural way and explain your problem to the children; unfortunately, it does not contain any drawings. The book is completely blank. Implore your audience for help and ask the children to magically simulate a drawing in your book.
Flick through the book again to prove to them that it has worked perfectly, it is full of black and white sketches. One last effort to color the drawings? But yes, right! After a few magical gestures, and an adequate formula, your book appears completely in color.
A wonderful instrument, with which you make your audience participate for long minutes in a wonderful magical experience.
Works entirely automatically.
Length 20cm by 14cm wide.