You might want to mention that you are thinking of leaving the position, maybe letting them know what your reasoning is (commute is too far, you want less/more hours, you want to work with a different age group, etc). This can let you MB know that it is something that could be happening, whether it might be 2 weeks from then or 2 months. It could also give them the chance to offer ways to change, if that might be a possibility for you at all. Gives them the feeling that they could at least try to work things out instead of you just saying out of the blue that you are leaving.

I would do it closer to the time you are ready to leave, so that if they find someone to replace you before you give actual notice, that you are ready for that. After having a simple discussion about it, then you can find the right time and sit down and write out everything you want to on paper (or email), along with mentioning when your last day will be (if they keep you until that date).

I have found it to be easier to have the subject brought up in advance and then doing the written notice makes it official with the timing, and tying everything up neatly.

OP, I agree with the prior posters. You should first talk to the employers, then follow up with an email or letter if you want the opportunity to express yourself more clearly.

However, I get the sense from your "can I write to them and see what they say about it" comment that you don't really want to quit, you want to renegotiate terms. If that is the case, don't frame the discussion as a resignation; that would be immature and will probably make the parents feel manipulated and distrustful of you. Instead, ask for a time to sit down and talk about what aspects of the relationship are working and what aspects are not working, then explain whatever changes you want and why you think those changes are fair or necessary.

OP you should do both - put it in writing and then bring your resignation letter to your in-person conversation. This will give you the opportunity to express yourself clearly (in writing) while also giving you the chance to maintain your professionalism by resigning face to face.

If you can I'd talk with your employers. You can follow up in writing, but if you've had a gracious, respectful relationship for two years I think the right thing to do is a conversation.

Wouldn't you want the same from your employer, rather than an email you got after you left the house, saying they were going to be letting you go?

I would rather my employee have the balls to look me in the eyes. It'd make me respect them more.

Thank u all for the reply.

I would definitely schedule a time to discuss it with your boss. Sure, in an office, the "official" way to give notice is to put it in writing, but in actuality you talk to your superior first. And also, this is not an office. Nanny/MB/child situations are more personal in nature. I would definitely have a discussion. If it's hard to do that, schedule it with them, give the kids an activity and talk to them in another area of the house or room.

Do it whichever way is most comfortable for you. In regular office, retail etc jobs, it's customary to give notice in writing. In my nanny experience it's been in writing.

First talk to them in person. Schedule some time to talk. You can follow up with a letter telling them that you hope to stay in touch.

I think I want to quit my job after 2 years.Can I write them an email about it or I should seat down with them?
The kids are always around and it's hard to talk while I'm there.Can I write to them and see what they will say about it?
The reason for the email is because of our time and I think I express myself better on writing(English is not my first language).