It is a small, worn, leather-bound notebook. Inside, on the first page, in Sheldon’s neat handwriting:
Birthday morning. The kitchen is decorated with a lopsided banner Mary made. Missy opens presents: a bracelet from Mary (not the mall one—budget was tight), a football from George Sr. ("so you can throw it back at your brother"), and a used video game from Georgie. Then she opens Sheldon’s. young sheldon s03 vp3
"That was real sweet, what you did."
"For Missy. Observations on Human Females, Age 9.72 to 9.99. Data includes: 47 instances of genuine laughter (categorized by type), 12 tears (reasons indexed), 3 successful negotiations with Mom for extra dessert, and 1 theory on why you spin your hair when nervous. Conclusion: You are more interesting than any celebrity. Happy Birthday. — S." It is a small, worn, leather-bound notebook