catching up

bB was late to walk and late to sign.  We were worried about him.  In the last month he's learned to walk and 8-10 signs.  So suddenly he's all caught up.  And he's got special tricks, like signing Diaper when he wants a change.  His signs are:
More
Please
Water
Eat
Milk
Bird
Help (variation)
Diaper
Go
Mine

 This is bB at 12 months, not walking but climbing up onto stools in the kitchen.

Now that he walks, at 15 months, he keeps climbing.  He loves to slide out of this chair between the back and seat, like he's on the Dukes of Hazard.  He's so tall that he has been opening doors for months.