Make paper models that demonstrate some of the fundamentals of chemistry. Models include a 3-D model of the periodic table, ammonia, neon, water, carbon dioxide, methane, nitrogen, cysteine. A minibook gives a good introduction to chemistry. Careful cutting with very sharp knife required. Ages 12 and up, or teacher reference.
Every life form is an expression of the DNA molecule.
Here is a great way to get involved in a complex subject, by making models of the double helix, virus and nucleotides. Includes a 27-page book that explains the models and discusses such topics as mutations, cell division, Mendel and Darwin, chromosomes, genetic variation. Jr high to adult. A hands-on guide to the natural features of the earth and the forces that create them. Areas include maps, soil, urban geology, drainage basins, erosion, fossils, meteorites.