fun with bicarb of soda

We happen to have a 20kg sack of bicarbonate of soda in the house (doesn't everyone?). Known as baking soda by Americans, it seems to have a myriad uses.
We used some for our clay Xmas ornaments, husband uses it for soda-blasting, and today we found another fun thing to do with it.

A tray of baking soda, a couple of containers of vinegar with a few drops of food colouring (we only had two blue and green at hand this time) and a couple of medicine droppers.

The droppers were soon discarded in favour of small syringes, which made for much more satisfying application.

It's very cool how the bicarb fizzes and bubbles when the vinegar makes contact.

And an unexpected result was the fun to be had afterwards. With a silky, sticky, powdery texture the coloured bicarb proved to be almost more entertaining than the fizzing, and the game lasted for ages.

You'll want to do this one outside though, or in an easily cleanable space - and although it's not great for photography, I'm once more very grateful for our 'art room'.