I propped the black and white rainforest cards along the changing table and my newborn actually tracks them now instead of staring off. The high-contrast designs really do grab her, and tummy time goes a lot smoother with these in front of her.
My four-month-old's eyes lock onto the high-contrast black and white animals the second I hold a card up, and tummy time fussing stops almost instantly. The cards are sturdy enough that her grabbing and mouthing hasn't wrecked them yet.
I propped the black and white rainforest cards up during tummy time and my three-week-old actually locked eyes on the sloth image for a solid minute. The contrast is strong enough that even my sleepy newborn tracks them, which I didn't expect this early.