For hundreds of years, humans dreamed of soaring through the skies like birds. Then the invention of the hot air balloon brought us closer than ever before. Most incredible of all: This amazing invention requires just a bit of hot air to send it floating among the clouds. This book shows you how.
For hundreds of years, humans dreamed of soaring through the skies like birds. Then the invention of the hot air balloon brought us closer than ever before. Most incredible of all: This amazing invention requires just a bit ...
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