Is there a way to add a second seat to this type of jogger?

Hi ?Camille, thank you for your inquiry. No sorry, the only option is the Gilder Board for a toddler who can stand. Click the following link to view ?https://www.babyonthemove.co.nz/on-the-move-/single-buggy/buggy_boards/Baby-Jogger-Glider-Board. We hope this has helped with your query.