One thing that has been quite interesting about having kids close in age is the rate at which the 2nd learns something. Most of the time they are good things they are learning from their close sibling but other times not so much. Zoe is 4 years older than Zeke so when he started exploring and getting into things there were certain areas I could tell Zoe NOT to teach him (like how to open some certain cabinets). She understood and tried to teach him the good things. I, of course knew the day would come soon enough and was not in a rush. But Zeke, being only 13 months older than Oliver did not understand this logic and proceeds to teach his brother all sorts of useful things. Like the cabinets I was talking about and how to use a chair to reach light switches and out of reach table areas to name just a couple. Oliver has been a great student and applies his new skills often.