Little Jack experiences biological evolution unexpectedly when his imaginary brother Cool-Doo and friend Sleepy-Doo suddenly turn to be real in a strange storm. Cool-Doo and Sleepy-Doo need Jack's help to go back where they come from. Everything goes fine. Until Sleepy-Doo suddenly disappears...

Do you get along with your brother? Jack doesn't Although he has always expected to have a brother to play with, he finds his dream of brotherhood shattered after he gets a really "special" one. This special one always impresses Jack's parents. Plus, this special one also has a special friend of his own, and things always stir up crazily. Finally, a chance comes for Jack to impress his parents. His hometown is placed in danger while he and the other two special guys are in a space camp, and he only has one night left to become the hero. But, of course, his "special" brother also wants to be...

Cool-Doo Math is a comic series with all the main characters from TUM - The Unmoved Mover. Word problems are usually boring for most kids. Cool-Doo Math turns those knotty problems into funny and fun comic stories. Kids will find math so interesting

Little Jack experiences biological evolution unexpectedly when his imaginary brother Cool-Doo and friend Sleepy-Doo suddenly turn to be real in a strange storm. Cool-Doo and Sleepy-Doo need Jack's help to go back where they come from. Everything goes fine. Until Sleepy-Doo suddenly disappears...