This packet includes a fun activity that can be done as a whole class or in small groups. There is a letter from a "mouse detective" in search of a mouse. The mouse, "Melvin" leaves clues (number sentences) around the classroom. Students look for the clues and put them together to make fact families. There is a practice page for fact families for students to complete. Also included in this packet is a lap book that students can read and color. This is a great addition to book boxes for Daily 5! Following the book is a writing activity. Hope you enjoy!