Emily is almost 2 (WOW! it's strange to think that!) and she has had her vest sonce May. She doesn't mind it once it's on and started. We do her nebs at the same time, and she DOESN"T like that, but, I think it's because we hold it on her face and she feels "forced" to do it. She's an independent little bugger. That's why she resists the vest at first , too.
But, once the "shaky shaky" starts, she's fine. SHe watches the Wiggles (She is a freak for Murray, the red WIggle.....LOVVES him!). SHe plays with her big sister. IT is hilarious to watch a 5 year old and a 2 year old in a vvest try to play hopscotch. The play dough is a good idea. We also sing a lot. SHe yells out a song and we all sing it. That's pretty funny too, since we can only tell what she is saying about 70% of the time. The rest of the time she gets MAD when we start singing the wrong song.
My one piece of advice, try not to let her actually see you pushing the buttons that turn the thing on and off. Once Emily found that...well, we have had to re-start many times. Oh, and she loves to pull the hoses out, too.
But, you will love the vest. It is absolutely essential.