He didn't. Yo-yos have been around for over 2500 years. Ancient Greek excavations have unearthed yo-yos made of terra cotta, wood and metal. Phillipine hunters have used yo-yos for small game and birds for 400 years. The word yo-yo itself is Tagalog for 'come, come'. Mr. Flores' contribution is limited to marketing in the US only, during the 1960s.
1 month
About five years.
Patience.
imediately
The one in Spain is 24 hours.
A person does not 'develop' autism - a person is born autistic.
From the time your breasts begin to develop, it should take two to three years to completely develop, however some girls do develop slower or faster than that.
It's May be take 2 days
1/2 years
Eight thousands years
62 days
An penguin is a bird that can take a very long time to develop from an egg to an adult.