For a beginner: get a Sweetone. They sound *much* better than Generations for not much more money. Susatos are only a bit more expensive, but so loud you have to be prepared to be the dominant sound in the mix- further on than knowing "a few tunes".

The one problem with Sweetones is that they come shrink-wrapped. For every other musical instrument in the known universe, you can try it before you buy. Fortunately their quality control is pretty good.

Or just get a recorder - a not-quite-bottom-end plastic Yamaha will knock the socks off any whistle at the same price for tone quality and accuracy of intonation.