The toy builder interface is really cool and intuitive, and the procedural animations are very impressive! The way the character adjusts to all sorts of crazy creations is really neat to see. Maybe having the hips pivot a bit during the motion could help with clipping issues somewhat. I think the sound effects are very fitting, I would love to hear some sort of a "wacky workshop" background track to accompany them. If you feel passionate about the idea, I think this concept can be expanded into a shop simulator where the player creates toys for a variety of different clients.