remember this? this was when bodie was around bobby's age now. i remember that he filled up the whole tub...but i still loved the idea of it, so we kept it around for little bobby. i have been using the tummy tub mainly for his baths - i like that he can sit up comfortably and he seems to love it too! you can tell in the last pic that bodie is quite sad...he kept saying "Bodie turn...Bodie turn!" so we let him crawl in after bobby was done...holy crow - he is obsessed now! he will stay in there for at least a half hour.
he is such a ham - he is always trying to do whatever we are doing for the baby...tries to go in the swing - tries to swaddle himself - gets into the walker and the infant car seat.
This one was given to me as a gift, and at the time i think they were kind of hard to find, but i found this one on Amazon.
so apparently they work for your big and littles :)