Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Guidecraft Better Builders 100 - Piece Magnetic Ball and Rod Construction Set, STEM Educational Building Toy
Product description: With strong magnetic force, unique rod and ball configurations and a myriad design possibilities, Better Builders are a wonderfully inventive way to help children discover principles of science, construction, and engineering (STEM) while developing their creativity. Includes handy storage bin and deluxe 13-page Activity Guide which explores magnet science and provides building model examples for all ages.
Product feature: Open-ended magnetic construction toy for preschool age children, Set includes 100 primary color pieces, storage bin and an activity guide, Over-sized rod shapes with grooved grips and inset magnets are perfect for small hands, Coordinates with all Better Builders building sets, Educational Focus: Exercises creativity and based on STEM principles including science, engineering and magnetism
Product brand: Guidecraft
Target attributes: Type
Answer: attribute: type
value: None
source: None