Had when i worked in a preschool and kids love them! I would use colored sand instead of white salt. DIY salt tray with alphabet cards. Easy to make and kids have fun smoothing out the salt after correctly making the letter
Baby sensory play for a 6 to 9 month old baby. Wrap cling wrap around a canvas and have the baby smoosh away with their hands and feet. So much fun, but I'd do it without the Cling wrap! Edible paint and babies are washable!