Is it ok to build a cardboard boat with a small pocket of air

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How to Build a Cardboard Boat: Easy and Simple Design

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DIY Cardboard Boat!

How to Build a Cardboard Boat: Easy and Simple Design

Easy DIY Cardboard Boat Tutorial How to Make a Small Cardboard

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How to Build a Cardboard Boat: Easy and Simple Design

Cardboard BOATS with ENGINES!