Amazon Kindle Fire 7 (9th Gen, 32 GB)

The Kindle Fire 7 is best for streaming and nothing more. It's slow and lacks HDR. Its rugged construction and lower price make this a decent option to give to your kids.
Pros and Cons
Pros
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Inexpensive
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Sturdy build quality
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Expandable storage
Cons
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Sub-par display
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Mono sound
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Charges via MicroUSB