Set them by baby with his/her age showing and snap a picture to share on social media and treasure forever -- they grow so fast! Use the littlest block when baby is one week, one month, and 2 to 5 months old. Use the bigger block from 6 months to 11 months old, and the biggest block at 1 year, 15 months, 18 months, 2, 2-1/2, and 3 years old. Perfect and unique shower or new baby gift. Also a cute decor accessory for the nursery. Handmade in the USA. Three solid, hardwood blocks: 2", 2-1/2", and 3" in size.