In the simplest play, the string is intended to be wound on the spool by hand; the yo-yo is thrown (a)   (what direction?)

The word yo probably comes from the (a)   (Ilocos dialect in the Philippines) term yóyo, or a cognate word from the Philippines.

In 1928, Pedro (a)   (last name), a Filipino immigrant to the United States, opened the Yo-yo Manufacturing Company in Santa Barbara, California.^[

Shortly thereafter (c. 1929), entrepreneur Donald F. Duncan recognized the potential of this new fad and purchased the Flores yo-yo Corporation and all its assets, including the Flores name, which was transferred to the new company in (a)   (year)

The name "Yo-yo" was registered in 1932 as a trademark by Sam Dubiner ^[he] in Vancouver, (a)   (country)

In 1933, yo-yos were banned in (a)   (country), because many locals superstitiously blamed the use of them for a severe drought.

In (a)   (year), the Duncan Toys Company opened a yo-yo factory in Luck, Wisconsin.

The Duncan yo-yo was inducted into the National Toy Hall of Fame at The Strong in Rochester, New York, in (a)   (year)

In (a)   (year), dentist and yo-yo celebrity Tom Kuhn patented the "No Jive 3-in-1" yo-yo, creating the world's first "take-apart" yo-yo, which enabled yo-yo players to change the axle.

The era following the yo-yo boom of the late (a)   s (year) is often referred to as the "modern" era of yo-yo. The modern era of yo-yo is characterized by markedly more complicated and sophisticated yo-yo techniques than came before in addition to a plethora of different yo-yo designs created to serve various niche purposes.

There is no sound historical evidence that yo-yos were ever used as (a)   ; the notion is believed to have been a marketing gimmick disseminated by Duncan yo-yo demonstrators in the early years of the company.

In the simplest play, the string is intended to be wound on the spool by hand; the yo-yo is thrown (a)   (what direction?)