Fun with precrawl exercise - 7 months 15 days

Richie is now sitting unsupported when kept on the floor.He has completed 32 weeks i.e 7 and half months. Though he is not yet sitting on his own,he is doing his "precrawl" exercise, rocking back and forth on hands and knees with his trunk parallel to the floor. He gets excited and giggles and laughs. I kept some toys in front of him (a little out of reach) and he went a few paces on his fours and got it too. I felt really proud of him.
It seems most babies begin to crawl between 7 and 10 months. A few never crawl at all and bide their time until they're ready to walk!