What do you do when you know someone might leave - but you want to be their friend anyway? In 1967, Tabitha is the tallest girl in her class and the quietest. She notices everything and says almost nothing. Then Trudy moves in across the way. Trudy wears a fedora and suspenders. She draws in a sketchbook she never lets anyone see. She keeps her life in a cardboard box she never fully unpacks, because unpacking means believing she's staying - and believing is the thing that hurts the most. Tabitha wants to reach out, but words have never come easily. So she writes I'd like to be your friend on a scrap of notebook paper, slips it inside a red paper-mache balloon, and clips it to the laundry line stretched between their houses. That small gesture becomes the beginning of a friendship built in quiet ways: notes passed across the line, drawings shared carefully, strawberries pushed toward the middle of a table, and piano music played into the dark. But Trudy is in foster care, and staying has never been something she knows how to trust. Tabitha begins to understand that loving someone does not mean being able to keep them, and that friendship can matter even when you do not know how long it will last. Over the course of one unforgettable year, two girls who both know what it means to feel different learn how to notice one another, how to sit beside what hurts, and how to offer the kind of care that asks for nothing in return. The Red Balloon is a tender middle grade historical novel about friendship, foster care, belonging, separation, and the courage it takes to care about someone whose future is uncertain. Set in 1967, it offers young readers an emotionally honest story about housing instability and foster care without reducing a child to her circumstances. It is equally a story about the quiet child who sees what others miss - and learns that noticing can be its own form of love. Some friendships last forever. Some last one year. Some change everything.