This is a video of father and son Dan and Lincoln Markham from Youtube channel What's Inside? cutting open an original 1980's Teddy Ruxpin toy to see what makes it work. They mention at the beginning of the video that they bought the mint condition toy from a collector for like $500. So why not hack it to pieces then bash it with a sledgehammer and make that collector cry? TL;DR: Teddy Ruxpin is made of nightmares.
Keep going for the video.
Thanks to JTS, who's a real surgeon and only uses the sledgehammer as a last resort.