I would thoroughly recommend the Dan Zane CD "Sea Music". Has some great songs for kids and it's for adult enjoyment too.
Plus his web site (http://www.danzanes.com/main/lryics_chords.shtml) provides all the lyrics and chords for every song.
CD has : strike the bell, farewell nova scotia, cape cod girls, shenandoah, blow ye winds in the morning, all for me grog,leaving of liverpool, windy old weather, sloop john b , long time ago, mingulay boat song, deep blue sea, the mermaid, rolling home.

AnneMC