I read a tip to lay baby on an inflatable ball (like a yoga ball or large beach ball - mine is 55 cm), rather than the floor. The slight curve of the ball helps them really lift their head and chest. A few days of this for mere minutes, and now DS can lift his chest and support his weight on the floor as well. Total game changer!
Re: For anyone struggling with tummy time...
Me 28 DH 30
After 4+ years TTC