Simply fill in the blanks of this diminutive volume and voilà: it becomes a personalized gift your offspring will read again and again. Make it as playful, prideful, or parental as you please! The ultimate “Love, Mom” book. A gift offspring will treasure (even if they're grounded for life). Hardcover with removable clear plastic jacket; 4.5 × 3.25-Inches; 112 pages. Knock Knock is an independent maker of clever gifts, books, and whatever else we can think up. Our mission is to bring humor, creativity, and smarts to everyday life. Put the fun in functional with Knock Knock stuff.