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)
Fun Simple DO-ABLE Activities for 18 to 24 Month Old Toddlers
Toddler Grocery List Take it with you to the store and while your toddler is strapped in the cart, give him a crayon and his toddler grocery list and tell him to keep an eye out for all the things you need. It will occupy him and keep everyone happy!
20 Amazing Ways To Keep Your Kids Busy All Summer Long!