American Science and Surplus
A retail outfit carrying everything from toys and novelties to motors, tools and science kits.
http://www.sciplus.com/

Collectology.com
Offers specimens and gear for biological, paleontological, and geological collecting. Also offers appraisal services.
http://www.collectology.com

Crystal River Gems
Large selection of jewelry, fossils, crystals, and object d'art.
http://crystalrivergems.com/

Discovery Scope
Scopes for magnifying small objects. Site includes accessories and t-shirts for sale, also.
http://www.discoveryscope.net/

Edmund Scientific
Offers a wide range of products for science enthusiasts.
http://www.edsci.com/

Efston Science
Science and astronomy superstore, with a wide variety of equipment and supplies for sale.
http://www.escience.ca/

Electro-Chem-Technic
Makes and sells a novel small fuel cell, and offers hydrogen sources, accessories and materials for self-assembling. Based in the UK.
http://www.ectechnic.co.uk/

Enerdyne
Optics, toys, garden products, Petoskey stones from Michigan.
http://www.enerdynet.com/

Exploratorium Museum Store
Science toys and games, puzzles, gifts, books, classroom resources, charts and posters, videos, and software.
http://www.exploratoriumstore.com/

Explore
Includes dinosaurs, flying toys, gyroscopes, astronomy, boats, globes, and solar kits.
http://explore4fun.com

Gem Trees by Patrick
Replicas of bonsai trees made with semi-precious stones.
http://www.gemtrees.com/

Geographics
Purveyors of decadence in academia, T-shirts, bumper stickers, and other paleontology and science-themed materials.
http://localgeographic.com/

Math is Radical
Offers a CD of printable posters related to the history of mathematics.
http://www.mathisradical.com

Microscope Pen
Offers a 100x pocket microscope.
http://www.microscopepen.com/

National Geographic Store
Features maps, videos, DVDs, books, magazines, globes, and telescopes.
http://shop.nationalgeographic.com/

National Wildlife Federation
The online shopping site for the NWF featuring nature-themed products.
http://catalog.nwf.org

Nature's Wildlife Window
Offers nature-themed sculpture, home accessories, and clothing.
http://www.natureswildlifewindow.com

Omni Optical
Optical science, prisms, illusions, fiber optics, microscope, telescopes, optical science activity kits, magnifiers and binoculars are a few of the items offered.
http://www.omni-optical.com

Polarization
Everything polarized, from variable sunglasses to science kits.
http://www.polarization.com/shop/catalog/index.html

Quality Items of Montana
Specializing in Oregon Scientific brand fitness and weather products.
http://www.qualityitemsofmontana.com/

Science Fair Projects Online
Purchase and download science fair projects with step by step blueprints.
http://www.terimore.com/

Science Line
Offers a large variety of science items.
http://www.scienceline.net

Science Shirts
T-shirts and other apparel with a variety of science themes. Also offers mugs, mouse pads, and other accessories.
http://www.rutnet.co.uk/scienceshirts

Store for Knowledge
A variety of kits, models and toys related to several sciences.
http://storeforknowledge.com/

Tech Museum Online Store
Science toys, gadgets, gizmos, models, and reconstructions.
http://store.thetech.org/

Technika Gadgets and Gifts
Source for scientific equipment, gadgets and gifts.
http://www.technika.com/navpage/cat_gdgt.htm

The Nature Store
Books, videos and gifts with an emphasis on birds and butterflies.
http://thenaturestore.com

The Science Company
Sells a selection of weather instruments, microscopes, telescopes, GPS and related accessories.
http://www.sciencecompany.com

Unlimited Exotica
Rocks, minerals and fossils, cacti, succulents and carniverous plants.
http://unlimitedexotica.com

Yellowstone Gifts
Assorted items, including books and apparel, from Yellowstone National Park.
http://www.yellowstonegifts.com/