There is no way to cancel a build. I just selected the lemon bowl (which has no purpose!) and will take AN HOUR to build and I can't cancel it. It's not even made yet but my materials are gone forever. Also it's annoying that in the cat journal it tells you what each section is for every time you open it. It would be so much better if you could select "don't show again" and place a "?" button in the corner with the page's function. Also I had to find out how to fill in the cat blanks on my own.