A 12v battery pack from a PowerWheels(r) car and two planks of wood with several nails punched through each. The nails were each wrapped with a couple turns of speaker wire that ran out to his ignitors, and the other leg came back to a central positive terminal that connected back to the battery. Not super elegant, but very effective and easy to troubleshoot and control.
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First off I started with a blank piece of 1/4" MDF I purchased from Home Depot. This served as the base board for the electronics. I decided on a layout for the controls, and then using my drill press and my eyeballs I put the 24 holes for the push-buttons and then used a hand drill for the LED holes. I then used my Dremel tool with a router bit to free hand the slots for the speaker terminal connections. I am not a carpenter, nor to I claim to have any sort of artistic capability. this part is utilitarianism at its best. It was at this point that I *noticed* my MDF was too thick for the buttons and switches to mount to without modification. so at this point I broke my Dremel back out and cut recesses around EVERY SINGLE button hole to reduce the thickness from 1/4" down to around 1/8". This was where I lost about 2 hours on my build, because these recesses had to be done free-hand, and it generated copious amounts of dust. Then I started mounting components. I started with the push-buttons and then the LEDs. The push-buttons had nuts to hold them down, and for the LEDs I just used a touch of super-glue right at the edge and it worked great. The speaker terminals and other switches were very simple to mount. This left me with a very pretty front panel (ignore the fact that I can`t measure and things are a bit crooked). From the primary switch (key-switch) tie in each green LEDs long leg (positive). I used simple jumpers...
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