1. Your World of Invention - Upside-Down-O-Scope

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. 30 min

Build your own cracking contraption Upside-Down-O-Scope!

2. Your World of Invention - Wind-Powered Sprinkler

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. 30 min

Build your own cracking contraption Wind-Powered Sprinkler!

3. Your World of Invention - Atmospheric Railway

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. 30 min

Build your own cracking contraption Atmospheric Railway!

4. Your World of Invention - Fin Ray Grabber

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. 30 min

Build your own cracking contraption Fin Ray Grabber!

5. Your World of Invention - Spy Camera

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. 30 min

Build your own cracking contraption Spy Camera!

6. Your World of Invention - Air Rocket

0

. 30 min

Build your own cracking contraption Air Rocket!