Jim and Judy in Teleland (latter rebroadcast in 1959 under the title Bob and Betty in Teleland) is one of the first, if not the first animated television series. The show was created by Paul N. Peroff, produced by Television Screen Productions, Film Flash Productions, and originally aired from some time in September of 1949 to 1950.
Jim and Judy enter their television for adventures.
During it's original run parants complained that their children where trying to enter the television, much like Jim and Judy.
Show would make it's way to Venezeuala by 1954, and Japan by 1956.