Hi, I was recently able to get this trinket https://www.wowhead.com/es/item=65357/rainbow-generator through a quest chain in felwood but when tried to use it to see the animation it just doesn't work. Maybe you can check it out to confirm.
• https://imgur.com/a/12QbWtq
As a suggestion, this item is no longer a trinket since legion, so maybe it would be better to make it a toy if possible.
Kind regards,