Magnets!! I love these magnet shapes. They're great for creating 3d shapes when kids are older, but right now they are also perfect for Lily to play with. These are great for gross motor skills, sensory play with the texture and colour, and cause and effect.
Lily is 6 months now and super in to grabbing things. So I picked up these magnets from Kmart. I stuck them on the bottom of our fridge, sat Lily in front of it and let her play. She found it hard to grab the magnets when they were all stuck flat so I moved them to overlap each other creating gaps for her fingers to get through.
Lily had an amazing time. Entertained her for a long period of time. She'd pull them off, suck on them, wave them about and they'd stick back in the fridge or other magnets.
We also tried using the magnets stuck to the bottom of a muffin tin while Lily was in the highchair. .