Calming bottles - these sensory bottles are great for little ones to explore and for preschoolers to use during a cooling off period. Water bottles with small amount of water poured out. Glitter glue, loose glitter, jewels and superglue to seal cap.
Discovery bottle - Fill to the very top with one part baby oil and one part water (with a few drops of green and blue food coloring mixed in). Shaking will produce gorgeous clear bubbles immersed in t(Bottle Green Room)
Not that I'm a stay at home mom but these are great ideas! The Stay-at-Home-Mom Survival Guide: Toddler Activities - peeling tape off the table (or fridge) develops fine motor skills (lots of ideas here)