Preferably it will be a sailboat that they will be excited by (i.e. it needs to somehow be more appealing than Minecraft or Dragonvale). Ideally, it will be durable enough, and versatile enough, for kids to use for exploring, simply messing around in, and for scaring themselves (just a bit) when they want a thrill. And since the minutes spent sailing go up in inverse proportion to the minutes required to get a boat on and off the water, it should be as easy as possible to rig and derig. Also, it would be nice if it was semi-indestructible because, yes, they are going to bang it into things. And maybe it would be good it it could be sailed by one kid, or a few kids, or even a kid and a big person (like me!). Oh yeah, it should also be affordable.