Concentric shape puzzles for babies and toddlers

Various concentric shapes that can be stacked horizontally. I got the idea from a Montessori toy set which only had the hexagons, then I started with some shapes to match a Peppa book.

Each shape has 6 STL files, one for each of the 5 pieces (suffixed 1 through 5), and one with all the pieces together suffixed with the plural.

There are 12 shapes: circle, cross, diamond (rhombus), flower, heart, hexagon (the bestagon), oval (ellipse), pentagon, rectangle, square, star, triangle.

The outer/larger pieces tend to be thin for their size so preferably print with thick walls or more infill to make them sturdier. I opted for thicker walls at 5 lines and just 10% infill, this prints faster and pieces are more dense where they are thinner.