Just a silly speaker enclosure for the kids.  Had two cheap computer speaker sets where the USB driver was not up to the task of driving the speakers.  So I put them each into a speaker box with a bit of flare for the kids.  I power them with a 12v audio receiver and it works much better.   Still cheap speakers so not like I did any optimization, I didn't even balance the impedance right.

For the teeth i changes filaments so that you could get white teeth and red insides.

The speakers i had were 4 Ohm.  So I put the tweeters in series and then those in parallel with the “woofer”.  So total impedance was 2.6 Ohms calc but 3 Ohm measured which is under the standard 4 Ohm, but the 12V amp does not seem to have an issue and is cheap under powered so I skipped the 4 ohm resistor in series with the “woofer” since I would have to order parts and the point was using up parts.  ^^

FreeCAD attached.