What does winter look like in Inventor's Village? In this book, a child sees it through the eyes of Lotte's sister, Roosi. Roosi finds several new friends: a snowman, snowflakes, and snow tufts. She goes on a long sled ride and looks at a frog family through the frozen pond. Roosi wants to give a snowflake as a gift to her mother, but somehow it disappears from her hand when she comes inside... Roosi fills her belly with pancakes and goes to bed happily.

The book with text by Janno Põldma and illustrations by Heiki Ernits takes the toddler to Inventor's Village, where the characters will become familiar and dear to them through previously published books.