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Exploring Sound: Pitch and Frequency - Why Can't I Hear That?
- gbp prices
- Offer price: £10.39
- Rewards/RRP: £12.99
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Exploring Sound: Volume - Turn it Up! Turn it Down!
- gbp prices
- Offer price: £10.39
- Rewards/RRP: £12.99
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Animals in Groups: A Pod of Dolphins and Other Sea Mammal Groups
- gbp prices
- Offer price: £7.19
- Rewards/RRP: £8.99