learning his letters

i have come to learn that emmit's brain is like a sponge. it seems that i can't teach him new concepts, words, letters, ideas, etc fast enough. just when he's latched onto one thing he's starting on another. i started working on letters with emmit around his 18th month when i heard somewhere that that is the age when children begin to soak up everything in their path. now i find him sitting in his room reading through his letter books or puzzle practicing his letters (or just reading to himself while humming:). it's so cute! i think in this video he says balloon & banana (kind of).