Hello, Earthling!: The Junior Operator’s Guide to Ham Radio, Morse Code & 15 Real Missions That Actually Work (Cosmos Kids Field Guide Series) by Arthur Cosmos

You are about to learn one of the coolest things a human can do: send invisible messages through the air — and maybe listen for messages from very, very far away. Welcome, Junior Operator. Hello, Earthling! is a hands-on field guide that turns curious kids into real signal hunters. Inside this mission: How radio waves work — explained with jump ropes, wiggles, and zero boring parts Morse code you can actually decode, with practice transmissions to crack 15 real missions to complete before you get your license A Junior Operator Signal Log to record everything you hear Packed with Cosmos Facts, decoder puzzles, quizzes, and a notebook section for your own theories about the Wow! Signal. Book 1 of the Cosmos Kids Field Guide Series — real science for curious humans ages 6 to 12.