The PDFs hosted at Exploratorium have moved. (#4)

README.md

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 **#cardboardcircuits** are electronic modules built of cardboard, glue and scrap electronics. Modules are built by the kids themselves and electronic parts are sourced from deconstructing toys and other every day electronic gadgets. The modules are built from common classroom materials such as cardboard and binder clips. 
 
-Cardboard circuits are inspired from **[Tinkering Studio circuit boards](https://tinkering.exploratorium.edu/sites/default/files/Instructions/circuit_boards.pdf)**, **[Toy Take-Apart](https://tinkering.exploratorium.edu/sites/default/files/Instructions/toy_take_apart_0.pdf)**, and **[others]({{site.baseurl}}/reference)**.
+Cardboard circuits are inspired from **[Tinkering Studio circuit boards](https://www.exploratorium.edu/sites/default/files/tinkering/files/Instructions/circuit_boards.pdf)**, **[Toy Take-Apart](https://www.exploratorium.edu/sites/default/files/tinkering/files/Instructions/toy_take_apart_0.pdf)**, and **[others]({{site.baseurl}}/reference)**.
 
 > Sharing your creations on social media? Use **#cardboardcircuit** in [Twitter](https://twitter.com/search?q=%23cardboardcircuit) or [Instagram](https://www.instagram.com/explore/tags/cardboardcircuit/).
 

projects/index.md

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 ![A junk bot built from a game controller]({{site.baseurl}}/assets/gamecontrollerbot.gif)
 
-Just like **[Tinkering Studio circuit boards](https://tinkering.exploratorium.edu/sites/default/files/Instructions/circuit_boards.pdf)**,
+Just like **[Tinkering Studio circuit boards](https://www.exploratorium.edu/sites/default/files/tinkering/files/Instructions/circuit_boards.pdf)**,
 cardboard circuits should be exploratory in nature and drive by the interrest of the tinkerer. We provide a few inspiring projects to get their inspiration going. Encourage your users to come up with their own!
 
-> **Educators:** Read the [Educator Addendum](https://tinkering.exploratorium.edu/sites/default/files/Instructions/circuit_boards.pdf) on tips to setup your environment and facilitate sessions.
+> **Educators:** Read the [Educator Addendum](https://www.exploratorium.edu/sites/default/files/tinkering/files/Instructions/circuit_boards.pdf) on tips to setup your environment and facilitate sessions.
 
 * [On Off]({{site.baseurl}}/projects/on-off)
 * [Junk Bot]({{site.baseurl}}/projects/junk-bot)

reference/index.md

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 ## Reference
 
-[Tinkering Studio Circuit Boards](https://tinkering.exploratorium.edu/sites/default/files/Instructions/circuit_boards.pdf)
+[Tinkering Studio Circuit Boards](https://www.exploratorium.edu/sites/default/files/tinkering/files/Instructions/circuit_boards.pdf)
 
-[Tinkering Studio Toy Deconstruction](https://tinkering.exploratorium.edu/sites/default/files/Instructions/toy_take_apart_0.pdf)
+[Tinkering Studio Toy Deconstruction](https://www.exploratorium.edu/sites/default/files/tinkering/files/Instructions/toy_take_apart_0.pdf)
 
 [Pacific Science Center Tinker Tank](https://www.pacificsciencecenter.org/tinker-tank/)