Just added to my Etsy shop a collection of Nutcracker bauble designs. There are 4 in total and made up of 9 layers. I used 100mm diameter plastic fillable baubles that come apart, and the backs came covered in glitter so you can't see all the layers and sticky foam pads that I used to create the distance from each layer.
https://www.etsy.com/uk/shop/SASCreative?ref=seller-platform-mcnav§ion_id=20529532