For those that asked - this is so much fun!
Step 1 - Build the volcano - you need to pack the sand down really tightly!
Step 2 - Scoop out a hole in the front of the volcano, all the way to the centre.
Step 3 - Dig down into the top of the volcano until you meet the hole from step 2. If your volcano isn't packed down firmly enough everything will collapse about now.
Step 4 - Collect some small branches and twigs.
Step 5 - Load up the volcano with the twigs and sticks.
Step 6 - Light the volcano through the bottom hole (we only make our sand volcanoes when the weather is cool and the beaches are empty). Blow in the bottom hole to get the fire going a little better.
Step 7 - Sit back and watch the smoke come out :)