That's right: Teletubbies and The Wiggles are no-nos.

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It even stores maps locally via an integrated microSD slot, which means you don't have to delete those Wiggles albums off the iPhone's storage after all.

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The South West Coast Path, which wiggles for 1, 014 extremely undulating kilometres from Minehead in Somerset to Poole in Dorset via the shorelines of Devon and Cornwall, is Great Britain's longest national trail.

BBC: Walking Great Britain��s great coast

Nothing wiggles, nothing feels like it's in danger of breaking off, and all of the materials seem to be there for a reason: the tops of the jog wheels are grooved to feel like vinyl, for instance, and knobs, faders, and buttons are all coated in non-slip rubber or plastic.

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