Sounds creative! I will help you.
Sweatshirts- can be marketed to grandparents with a slogan and design on the sweatshirt they can relate to. The slogan can be Grandparents Rock! and the shirt can have different sayings like "my grandparent is cool or grandparents are smart...
Electronics- Advertise to grandparents by informing them that electronics tell time, have alarms to wake them, and they can read using them along with keeping tabs on their family.
art supplies- Advertise to the grandparents by offering a senior citizen sale for grandparents who like to draw, paint, and color with their grand children .
please vote my answer brainliest. thanks!
