A few days back the children and I made a volcano out of an empty 1.5 litre bottle & paper mache.
We secured the bottle to a piece of scrap card with tape then balled up newspaper, dipped it in PVA mixed with some water and built it up around the bottle. For the last layers we used flat sheets to make a smooth surface.
Once dried we painted it brown with red at the top to look like a glow effect.
Today we used our tuff spot to make a dinosaur island, we put the volcano in and covered the tuff spot in soil, popped in some pebbles, twigs and a small tub of water.
The kids played with the dinosaurs, dug and raked the soil and put soil into the water to make a swamp
After a couple of hours of play we were ready for the volcano to erupt.
I'm not keen on measuring, I'm a bung it all in and hope for the best type of person so here is what we used for the 1.5 litre bottle:
About 1/2 pint of warm water
a glug of red food colouring
about 1/4 bottle of white vinegar
a good squirt of washing up liquid
a tablespoon of bicarbonate of soda
First little Mr poured in the red colouring
Next he squeezed in some washing up liquid, then in went the water, filling the bottle about 3/4 of the way, then filling up with vinegar.
Finally in went the bicarbonate of soda and we sat back to watch.
The kids were amazed and I think their daddy was also impressed as he hadn't made a volcano before!
It was great fun, messy play, educational and we were out in the sunshine so it was the perfect activity. The children wanted to do the volcano again and again so we did and we have left it set up to play again tomorrow.