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Spintronics Act One & Act Two BundleThis pack includes 6 copies of Spintronics Act One and 6 copies of Spintronics Act Two. It's the complete story of Natalia, with 149 puzzles ranging from beginner to intermediate to advanced. You'll never see electronics the same way again. Spintronics Act One: Begin the time winding journey with Spintronics Act One. Get started building fascinating mechanical circuits as you solve 67 fun, challenging puzzles from beginner to intermediate difficulty.

The Spintronics Power Pack gives you parts to charge your circuits with more power: an additional 6 V battery and two low-value resistors

This replacement play mat kit provides all the parts for a sturdy surface to set up and build your Bridge or Bust challenges

and 6 copies of the Power Pack

but it can be used to allow counterclockwise current by placing it on the outside of a chain loop

Educator Classroom Bundle - with 16 Spintronics Act One games the whole class can play

Power Pack: The Power Pack gives you parts to charge your circuits with more power: an additional 6 V battery and two low-value resistors

This is the same amount of chain as is included in the Act One and Act Two kits

Spintronics Act One: Begin the time-winding journey with Spintronics Act One

the magic of Bridge or Bust means you can simply lift the bridge

a built-in circuit breaker stops it immediately

Find tips and tricks for building your own copy of Turing Tumble on the community forums at community

- vbottom is the velocity of a tooth on the bottom sprocket