Explore / Primary (ages 7–11) / History / Inventions that changed the world
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- The wheelNew: questions are written when you open itNew
- PrintingNew: questions are written when you open itNew
- The steam engineNew: questions are written when you open itNew
- Electricity and the light bulbNew: questions are written when you open itNew
- The telephoneNew: questions are written when you open itNew
- Computers and the internetNew: questions are written when you open itNew
- Medicines and vaccinesNew: questions are written when you open itNew