HI from an OT ( therapist) and now mommy of 7.5 momma view:
I beleive tummy time is important since it is stressed to decrease SIDS to have babies sleep on there back babies these days are actually hitting milestones later. When most newborns were put to sleep on there bellys when they woke up it gave them more insentive to roll over and manuever about. Now that most babies ( as its safer to put them on there back) sstart out anyway sleeping on there back they already have a view and dont have to work to look around/ Does that make sense?....
As for tummy time itself it is recommended if they are awake adn you are not holding htem it is good to place them on there tummy. A few minutes off and on through he day is good. 2 toys i highly recommend ( even though i prefere old fashion wood toys lol) is playschool tummy time picture show and tummy time plus.. i havent seen a baby that hasnt enjoyed it.
Another way to help baby enjoy tummy time over all is when you are holding them play air plane ( hold them belly down in the air or lay them over oyur lap belly down so they have to lift there head) now im not saying you have to give them 'therapy;if this is how its coming across lol there just suggestions.
Bobby pillows are great for helping strength however you dont wnat ot use it to long cause then tend to compensate.
Slings are also great for increasing neck and trunk control along with improving a babies vestibular input.
I had a friend ( no longer as we reallyl got into it) her son is 7.5 months old and still cant push up on his amrs when on his tummy along with other things he cant do.. Ive stressed to her the importance of floor time etc she kept him in a swing all darn day.. well not all day but alot of the time)
She swore my son seemed ahead cause I do 'therapy' on him lol that im magical lol NO its called a naturally developing child.. My son Kai develops because of his own curiosity and WILL.. OH YES WILL! LOL
As of today my son,Kai is 7.5 months old he crawls EVERYWHERE and if you hold his hands he can RUN LOL we are soooo in for it lol.... today he pulled him self up and opend all my dresser drawers so he could TRY to climb them..
If anyone has any kind of play ??? let me know and ill be more then happy to give you fun ideas
(updated site mid June)