Kukla, Fran and Ollie is an early American television show using puppets, originally created for children but soon watched by more adults than children. It did not have a script and was entirely ad-libbed. It aired from 1947 to 1957.
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The Book of Pooh
LazyTown
Mystery Science Theater 3000
Spitting Image
Greg the Bunny
In the Know
Andy's Wild Adventures
Thunderbirds
Mr. Meaty