Most solid geometry kits include the classics: cube, cylinder, cone, sphere, rectangular brick, half-octahedron, arch.
The half-octahedron relates back to the Egyptian pyramids, or Azteco-Mayan in the western hemisphere. The rectangular brick possibly alludes to phi, although this is rarely mentioned pre 4th grade.
The cone later leads to slicing of same: hyperbolae, parabolae, circles and ellipses (ovals).
Our newer geometry kits include some new thinking. For example, StrangeAttractors, drummed out of business by competing interests (cube heads, many of them), followed the already successful ZomeTool strut lengths, but with a less complicated hub system -- smooth ball bearings and tiny magnets, mounted on conical attrachments skrew-fitted into extruded plastic shafts of various color.
I have a shrink wrapped copy that'd probably fetch a fortune on E-bay, but I'm keeping it.
A lot of people could retire on the royalties from their good ideas if their fantasy castles offered real protection from the elements.
Many good ideas are obvious or thought of before, or would *seem* to be publicly out there (some naturally occuring creature's DNA for instance), but hey my pseudo-human corporation has the resources to get a WTO patent, so you, the powerless humans who actually do all the research and inventing will have to sign on the dotted line so your pseudo-human legal owners can sell your intelligence right back to you, with interest.
This kind of wasting of opportunities is going on in the aerospace sector more generally, wherein we find big fish defense contractors refusing to unveil any civilian upside to their darkly destructive enterprising.
They (the private contractors) outfit huge crews of destruction engineers (armies), supplement with arm twister lobbyists to buy off Congress, and then tear whole cities apart. For what good humanitarian reason, we rightly ask. Iraqis are asking the same questions.
If this was for "freedom" then where is it? Why isn't our GRUNCH-funded BuckyWorks hardly off the ground yet, in 2006?
Kids: remember which brands failed you. Design Science Toys wasn't one of them.