Any age! Your colorful DIY toys will be great for newborn eyesight development. They will be great for tiny babies grasping and stacking skills, which helps to refine motor development. Babies also start absorbing important lessons, such as volume, weight, and sound, through playing with these educational toys. They are wonderful for teaching toddlers colors, numbers, and letters. And for building castles and towers! Older children can practice spelling and reading with their Love Letters. And don’t forget the love notes, inspiring thoughts, and silly messages that teenagers and adults can leave for each other around the house! Note: We do not recommend that small children place the finished toys in their mouths. Although the toys are completely safe, their tiny but powerful teeth can scrape off the paint. We recommend that you play with the toys with your small child, using them as an educational toy to help their little brains grow. Remove the blocks when they start to mouth them.