It is a pretty simple design, and can also double as a gun. Includes a safety lock to prevent firing while you load it. You can also toss it with a lot more force than you could with a *splodie*. Those are the -PROS- and I see very few -CONS-, which includes the fact it fires one main piece and that it has to land on a concentrated area in order to fire some of the time.
Step 1: Main Mechanism - Part 1
You only need one of these white pieces. :)
Step 2: Main Mechanism - Part 2
Add 2 blue rods to the white centerpiece
Step 3: Main Mechanism - Part 3
Add 2 gray spacers and 2 gray connectors, alternated of course.
Step 4: Main Mechanism - Part 4
Add 4 blue connectors, tans can also be used, but u have to make 4 fit on. Be sure to slide one orange connector on in between the 3rd and 4th blue/tan connector.
Step 5: Main Mechanism - Final Part
Add a blue rod with a green connector on its end, the green connector having 3 white/gray rods attached to it. Then add one white/gray rod on the other end of the orange connector.
Step 6: Loading and Firing
Simply take the rubberbands and hook them on the end of the long gray rod and the end of the blue rods at the top of the explonade. Then you can toss it and if it lands on the green connector with the whites connected to it, it is pretty much guaranted to go off. If you miss it, the explonade could still go off, but not as a good of a chance.
Firing method 2 - Gun Firing
You can also hold the white/black connector and push on the green connector to fire it as a gun.