ink le ▁Show , ▁S co oby - D oo , ▁F at ▁Albert ▁and ▁the ▁Cos by ▁K ids , ▁The ▁Sm ur fs , ▁Al vin ▁and ▁the ▁Ch ip m unks , ▁Gar field ▁and ▁Fri ends ▁and ▁Te en age ▁Mut ant ▁Nin ja ▁T urt les ). ▁ ▁Some ▁locally ▁produced ▁children ' s ▁programs ▁– ▁which ▁often ▁mixed ▁cart o ons , ▁special ▁guests ▁and ▁audience - part icip ation ▁games ▁– ▁also ▁became ▁popular ▁in ▁the ▁local ▁mark ets ▁where ▁they ▁were ▁broadcast ; ▁one ▁of ▁the ▁most ▁popular ▁was ▁the ▁Bo zo ▁the ▁C low n ▁franch ise , ▁which ▁became ▁most ▁well ▁known ▁for ▁its ▁Chicago ▁version , ▁which ▁began ▁air ing ▁nation ally ▁when ▁W GN - TV ▁became ▁a ▁super station ▁in ▁October ▁ 1 9 7 8 . ▁ ▁However , ▁in ▁ 1 9 9 0 , ▁due ▁to ▁concerns ▁regarding ▁commercial ▁advert ising ▁and ▁cross - prom otion ▁in ▁children ' s ▁programs ▁by ▁parent al ▁advoc acy ▁groups , ▁the ▁Federal ▁Communic ations ▁Commission ▁passed ▁the ▁Children ' s ▁Television ▁Act , ▁legisl ation ▁that ▁among ▁other ▁prov isions ▁requires ▁all ▁broadcast ▁television ▁networks ▁and ▁stations ▁to ▁air ▁at ▁least ▁three ▁hours ▁of ▁educational ▁children ' s ▁programming ▁each ▁week . ▁This ▁has ▁made ▁it ▁much ▁harder ▁for ▁broadcast ▁stations ▁to ▁profit ▁from ▁children ' s ▁programs ▁than ▁was ▁possible ▁in ▁previous ▁years , ▁eventually ▁leading ▁the ▁major ▁broadcast ▁networks ▁to ▁abandon ▁traditional ▁script ed ▁programs ▁in ▁favor