Elizabeth and I have been doing a small "science" experiment lately. We mixed different colours of food colouring into water, poured it into an ice cube tray and put it into the freezer. She was seriously confused when we added blue and yellow and got green - I wish I had been able to get a picture! I got Elizabeth to touch the water before we put it into the freezer so that she could feel that it was liquid.
Later we brought out the ice cubes and Elizabeth got to feel them too. "Cold and 'ard", she said wonderingly. "And cold!"
We put the ice cubes into separate ziplock bags and let them melt. Elizabeth liked this. "Melting!", she informed everyone who came into the kitchen. When Elizabeth was a baby every now and then I used to let her play with a ziplock bag quarter filled with water to her great delight - best! toy! ever! (obviously I had to closely supervise to make sure she didn't try to eat it). So I didn't think twice about letting her play with one of the bags full of melted water. Turns out that babies aren't as strong or as fine-motor-control advanced. Who knew? For the record, my nearly two year old finds it funny to squeeze the bag vigorously and squirt Mommy, her socks and the kitchen floor with red food colouring. She pretty much destroyed the bag in a matter of seconds. "Oops..." she said. "Making mess!"