Cheyanne and I had a lot of fun making and playing with these boats. I think the ice cube boats are cute but they melted really, really fast. I would recommend making the bigger boats.
We used: Water, food coloring, plastic wrap, aluminum foil and tooth picks for the ice cube boats.
For the larger and better boat we used: Bottom of a 2 quart carton (such as O.J.), water, food coloring, aluminum foil, cookie sticks or Popsicle sticks.
Poor water in container, add food coloring and stir.
Cover container with aluminum foil and poke stick or Popsicle stick through the foil.
Freeze until solid.
Pull out of container and add sail made from aluminium foil cut into triangles wrapped around the stick.