Maybe seven yo yos don't qualify as mania, but they were an easy portable craft that kept me occupied and not worrying about sudden death on my flight home from San Francisco. Clover makes these cute yo yo makers in four sizes. As you can see, I only owe one size. These have a pretty ingenious design with great instructions included for making perfect little yo yos quickly from fabric scraps. Also nice for idle hands enjoying some TV time. Word to the wise - use strong thread.