There is a possibility of serious health risks should breast milk and / or formula be replaced with cow milk, particularly at the 4 - 6 month age range. (wholesomebabyfood.momtastic.com)
For the older 9 - 12 month age group why not try some water animal toys. (best-baby-gift-ideas.com)
Additional differences in school readiness are based on the 12 month age difference amongst incoming students. (earlylearningfoundation.com)