W.N.
Hi,
My son passed through this same phase- we had a bouncer thing that he would pull up on and stand next to- so we would just put big couch pillows behind him and to the sides for when he would fall...that way he could stand for a while and exercise his legs and I didn't have to worry about when he got tired enough and fell over. Eventually he taught himself to lower back down and then we never had to worry about that again:)- till the next phase- learning to walk!
-Wendy