Spanish additions to the lessons

I have been thinking of ideas for integrating Spanish into our curriculum. There are a couple routes we can go. Please let me know which ideas you'd most like to see integrated, because I think if we did all of them, it would be too much. But maybe not? Comment and let me know which would be best and how many things you think would be best.

1. Colors (a few per month, maybe 1-2?)
2. Days of the Week (just add it in to the calendar activities?)
3. Months (same as days, just add it in?)
4. Theme based vocab to mix in (e.g. for September: apple, tree, school)
5. Spanish activities (e.g. 1-2 activities to somewhat match the theme/fruit of the spirit each month)
6. Conversational type Spanish (1-2 phrases per month like "Please" "Thank you" "Good morning" etc.)

I don't want to overwhelm you or your kids, but I want to have options out there. What do you feel would be most fun/beneficial? I can incorporate all of it, but would it be too much? You can obviously do what works best for you, but I don't want to plan activities that seem like too much.