First is 13.25x19 7/8" waxed wrapper c.1950s Canadian for “Post Sugar Crisps” offering “Free Inside! One Plastic Racing Car Scale Model” with image on front of Sugar Crisps bears dancing above bowl of cereal and image on back of young boy wearing racing helmet watching race car speed ahead. Assembling instructions are just beneath. Bright and Exc. Second box flat is 12.75x19.5" c.late 1950s for “Alpha-Bits” Canadian c.late 1950s offering “Two Racing Sport Cars With Automatic Starting Track Only 25¢ And A Post Alpha-Bits Box Top” with image of two cars racing. NM. Third box flat is 12x17 1/8" for “Sugar-Coated Rice Krinkles” c.1960s. Box front has text offering “Free Inside! Racing Car With Starting Launcher” with cartoon image of mascot character “So-Hi” holding bowl of cereal with image on box back of kids watching cars race with cut-outs for start and finish flag men. NM. From the archives of premium creators Sam & Gordon Gold, accompanied by a letter to that effect from Gordon Gold.