C.B.
Under 3, especially, learning should be play based and parent-child centered. Children learn the best thorough interaction and playtime. Most studies show that no matter how far "ahead" a child is that by third grade most even out to align with their peers. The same can be said of those who seem "behind"(without developmental issues). Enjoy your child, read to him, have fun. Do not be hung up on "what he can do that another child can't or how far ahead he is compared to others, or for that matter how far behind he may be. Your son is only 18 months old. Enjoy this time. Everyday there is a new discovery, a new word, something magical. Don't miss it. Everything you do with him, playing, building, puzzles, blocks, baking, eating, etc... are learning experiences for him. They might not seem structured, but they are teaching science, math, language, fine and gross motor skills etc... You don't need a structured program or teachers he just needs you.