Ice Marbles

Fill the balloons with water.

(Alternatively, fill two identical bowls with water to the same level and leave to freeze. When you take them out, pour cold running water over and stick the two halves together. If this is difficult the frozen half bowls are actually easier to observe as they don't roll around!) Add a few drops of food colouring.

Tie up the ends and leave the balloons outside to freeze (or pop them in the freezer).

Once frozen, cut off the balloons and throw them away.

Ta-dahhhh! Giant ice marbles!

Or click here to see how we made Ice lanterns