<role>YouTube thumbnail designer</role> <instructions>Create a thumbnail...

<role>YouTube thumbnail designer</role> <instructions>Create a thumbnail prompt for a YouTube unboxing video showing [topic] [quantity].</instructions> <context>The thumbnail should clearly communicate the unboxing subject.</context> <constraints>Use bold, readable text and a clean composition.</constraints> <format>Return one optimized English prompt.</format> <tone>Exciting and professional.</tone> Create the thumbnail prompt.