Personalized Funny Chemistry Science Joke You're a 10 pH Scale T-Shirt Toddler Dress. You're a 10 on the pH scale, and that's the highest compliment you can get! This funny chemistry joke is perfect for anyone who loves pH puns and chemistry humor. Whether you're a chemistry teacher, a student, or just someone who loves to crack science jokes, this design will definitely make you and your friends laugh. Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!