Step 1: Materials
A Block of wood (It doesnt really matter what size)
A metal tube (make sure it can be drilled through, mine was an old airsoft barrel)
drillbits(must be slightly larger than your metal tube, and a small one thats about the size of a fuse)
Step 2: How to Build It
2. Insert the tube and make sure it fits snugly, if it is lose add some tape until its snug.
3. find where the end of the tube hits the wood and drill with a small bit about 3 cm up from the end of the tube
4. Drill all the way through the wood and through the top of the tube.
Step 3: How to Load
1. put the wick through the small hole on the top of the wood.
2. put the crackle balls through the end of the tube
3. light and move away
I am not responsible for anyone who gets hurt firing this. You are building this under your own consent. This device is dangerous and should be used under close adult supervision only. BE CAREFUL!