I found this idea at Buggy and Buddy and I loved it.
I set up four trays on the table.
Each tray has baking soda on it with a small cube
tray with coloured vinegar.
An eye dropper was used to transfer the vinegar
to the baking soda.
I used just one box of baking soda for the four trays.
This is what it looked like when they finished
making it fizz.
But for some children they took it a bit further.
Exploring the feeling, the texture.
Each day I would reset the trays and vinegar.
It's an inexpensive science experiment you can do at home.