Thames & Kosmos takes product submissions from inventors, authors and designers through a form on its contact page. Its store terms let it use any idea sent there, with no duty of confidence or pay. It licenses National Geographic for kits.
Where pitches like these are made: Spielwarenmesse, the Nuremberg toy fair · Spielwarenmesse eG, CC BY-SA 3.0
What it says
“Product Submissions from Inventors, Authors, and Designers”
What you agree to by sending something
“If, at our request, you send certain specific submissions (for example contest entries) or without a request from us you send creative ideas, suggestions, proposals, plans, or other materials, whether online, by email, by postal mail, or otherwise (collectively, 'comments'), you agree that we may, at any time, without restriction, edit, copy, publish, distribute, translate and otherwise use in any medium any…”
“We are and shall be under no obligation (1) to maintain any comments in confidence; (2) to pay compensation for any comments; or (3) to respond to any comments.”
What it has bought from outside
National Geographic and The Dangerous Book for Boys kits from National Geographic; The Dangerous Book for Boys
“It also produces kits licensed under other brands, such as National Geographic and The Dangerous Book for Boys.” en.wikipedia.org