Hi!
Crazy to hear how many bottom scooters we have! My son (11 months) is a bottom scooter, has never attempted crawling (he has always hated tummy time--which I attributed to his acid reflux, however he now loves sleeping on his tummy). He rolled late, sat up late, and is our "little scooter." My concern is his lack of pulling up on things, he started to attempt to pull up on his toy basket, a few months ago but learned he could tip it just enough to get out what he wanted and hasn't really tried to pull up on anything since! Like I said, he's 11 months and I'm concerned he's not pulling up and that the scooting will somehow hinder some type of muscle development. He uses one leg to get movement and kind of uses his arms. He's pretty fast, especially since we have laminant floors and slides easily!
He's great at fine motor skills and verbal skills, at 6 months when he wasn't 100% sitting up on his own or attempting to crawl, my pediatrician said some kids are more "content" and will most likely roll later, crawl later, etc. They're happy where they are and will not be eager to get around. I do plan on calling again since his 1 yr appt is a month away and I'm needing some reassurance on his pulling up.
I was told by a friend who's in physical therapy at a local children's hospital to not worry about the scooting, especially due to his age, he'll resist change and get too frustrated. She also said to just make sure he's using both hands/arms equally doing all other activities as well as moving both of his legs.
I'm enrolling him in a mom and me class at The Little Gym, it's like a Gymboree (gross motor skills class) and I'm hoping to see some leaps in his gross motor skills.
I'd love to hear how your little one progresses!