Play-Doh is the toy whose distinctive smell is officially trademarked.

Quick answer

  • The distinctive, nostalgic smell of Play-Doh is protected as a registered scent trademark in the United States.
  • The scent is legally described as a sweet, slightly musky, vanilla-like fragrance with slight overtones of cherry, combined with the smell of a salted, wheat-based dough.

Why this is notable

  • Scent trademarks are rare compared with logos or names, which makes Play-Doh’s smell one of the few protected toy scents.
  • The registration covers toy modeling compounds and helps Hasbro protect the strong brand association many people have with that smell from childhood.

Answer to your question:
The toy whose distinctive smell is trademarked is Play-Doh.