I found this tutorial on the internet how to make Peter Logan's exploding paste (from Brainiac).
How to make :
First of all, you need only two ingredients: Iodine crystals and Ammonium Hydroxide.
You can get the iodine at drug stores, camping stores, hardware stores, or even the internet. The ammonium hydroxide is a little more difficult to find, pure ammonium hydroxide anyway. However you can use diluted ammonium but, it’s purity affects the strength of the explosive. You can try to find it at drug stores, pharmacy's, hardware stores, and again, the internet; however diluted ammonium can be found at the grocery store.
Very strong household ammonia water will do OK, but it must be clear - if it’s cloudy, it won’t work.
OK, now we’re on to the making.
It’s a good idea to crush up the iodine crystals - this will make them react faster.
1.Put two tablespoons of the crystals into a glass or pyrex container that will hold at least 500ml..
2.Now add about 100ml of the ammonium hydroxide. You should always add a little more than you need here - if you add too much, it won’t affect the outcome, but if you add too little, it will be incomplete.
You want to stir the mixture for about ten minutes. If all goes to plan, you should see some bubbles of Hydrogen being given off. When these bubbles stop, the reaction is over.
3.Leave your mixture for about 5 minutes to make sure everything’s completely done, and you should see some stuff at the bottom of your container. This is your paste, which can be separated by pouring the whole lot through filter paper. Don’t worry about damaging your funnel - the liquid you’re getting rid of is just water now.
4.The paste should dry after about an hour, so if you want to keep it, store it with a little water (to keep it damp) in an airtight tin.
Remember, if you store it too long, it will decompose!
Now go and put this stuff all around your school, place of work or anywhere!