Is it possible to gauge an infant's (7 months) intelligence by how often and how long they seem to examine things?

Corrie has twins, a boy and a girl (of course they’re beautiful! Her other two kids are too! :) The twins are as different as night and day.

If you want to tell Kale you love him, you blow a raspberry at him. He will instantly grin and blow one back and then just laugh and laugh! You know he’s content by himself, if he’s laying in his crib, awake, quietly spitting and spluttering.

Kale seems to show no interest in things he can’t physically reach and touch.

Savannah, on the other hand, can spend 15 or 20 minutes, all by herself, just looking at things, like pictures on the wall or other ornaments.

Kale has known the mechanics of “walking” for several weeks now. You support him under his arm pits, set his feet of the floor, and he’s off like a shot, tearing across the room, left right, left right.

Savannah tends to just stomp her foot in one place. However, today I was holding her under her arms while I was sitting on the couch. Her feet were on the floor. She was moving them around, but leaned waaay over so she could SEE what they were doing. She probably spent 10 minutes just observing her feet. My arms got tired!

Savannah is crawling now as of 2 days ago. She went down for an afternoon nap, and when she woke up she just knew how to crawl, like something clicked in her brain as she slept.

Kale just manhandles himself across the floor, dragging his legs behind him. He doesn’t care that Savannah is crawling. If KALE were the one crawling, however, and not her, Savannah would be upset!

They’re both perfectly smart, perfectly on track for 7 months (which is a little amazing considering they were 5 weeks early!) but Savannah seems to have a different type of…consciousness about her. She has these startling blue eyes that just don’t miss a thing.

Kale just concentrates on what’s at hand.

Svannah has a much longer attention span than Kale.

What do you guys think about the cognitive difference in the twins?