12mo DS is very active. He became mobile quite early, crawling at 7 1/2 months and walking at 10 months.
He turned 1 last week and wants to climb constantly - the stairs, chairs, the sofa, coffee table - if not climbing he is just constantly on the move, emptying boxes or cupboards and pushing things around. He is also very vocal if you take something off him.
3yo DD has always been quite physical, she is in school half days but still needs a 'run' every afternoon - soft play, gymnastics, play ground etc. but DS is at another level.
He's happy, isn't one for crying, eats and sleeps well and seems to take great delight in watching his sister play.
It just worries me I guess that he is so active, silly I know but would love to hear of anyone with a DS who've been like this at 1 but hasn't become totally uncontrollable 