i hope this all within normal baby spectrum but 11 month old baby doesn't bear weight on his legs at all, just makes frog legs, he feels a lot like jelly when holding him (much like a smaller baby does IYKWIM) as in he doesn't have much body strength, he's just started sitting up but falls easily, when he grabs things he fingers are a bit sprawled out over the item, he moves around on his stomach, pulling himself around with his arms - a bit like swimming on dry land. i'm not sure if this is 'normal' - i understand all babies do things at different times, but he seems to be behind at everything - should he be checked out?