These are shapes that are directly from TinkerCAD. The intention is to cut out the side of a box and have a DIY version of those toys that kids use to put shapes into the appropriate holes or just blocks to help with dexterity. The widest side on any plane is 25mm.

Please don't be too critical, I am not a CAD designer and only spent 5 minutes making this.

You should probably consider using rafts/supports on some of the shapes.