[Alaska35]

what a nice, generous and thoughtful gift for your students. I feel badly for you and their actions are thoughtless.

The actions of the colleagues below you speaks volumes about their character. I don’t understand their line of thinking.

My advice:
I wouldn’t report it to the principal.
I feel that I would most likely think of a different gift to give your students next year. I think I would get upset every year when Christmas came around, as you mentioned, and have to listen to the comments from your students about their blankets from previous years.

If your colleagues were TRUE team players, they would get together and talk about doing something different so that the students would receive a different gift from all three of you. They should include you in the conversation and acknowledge that the blanket idea is yours. After all, you started that tradition first.

I hope my comments help you in some way.