Sciencekitwarehouse.com is a cost-effective source of replacement parts for STC and FOSS science kits.

Full Option Science System (FOSS) is an inquiry-based, kit-based science curriculum that was developed by the Lawrence Hall Of Science with substantial funding supplied by the National Science Foundation. The mission of the Lawrence Hall of Science (LHS), at the University of California at Berkeley, is to develop model programs for teaching and learning science and mathematics, and to disseminate these to an ever-increasing audience. This curriculum closely aligns to the National Science Standard. FOSS science kits are distributed by Delta Education.

Science and Technology for Children (STC) is an inquiry-based, kit-based science curriculum that was developed by the National Science Resources Center with substantial funding from the National Science Foundation. The National Science Resources Center (NSRC) is operated by the National Academy of Sciences, National Academy of Engineering, Institute of Medicine, and the Smithsonian Institution to improve the teaching of science in the nation's schools. STC closely aligns to the National Science Standards. STC science kits are distributed by Carolina Biological Supply Company.