Possible Clues:

• 'Kid Tested' cereal
• Cereal made with a 'puffing gun'
• Froot Loops alternative
• Cereal that dots the 'i' on its box
• Alternative to Corn Pops
• First puffed-corn cereal
• 'Kid-Tested, Mother-Approved' brand
• General Mills offering since 1937
• “Kid tested. Mother approved.” cereal
• Cereal for kids