Jordie, this is a great age to start introducing 'messy play':
sandpit or even a basin of rice with cups and spades and buckets
water, with or without detergent and food colouring
paint - finger painting or those large chunky round textas - you can make up non toxic paint using cornflour, water and food colouring
BUBBLES (she probably won't blow yet but will be fascinated by them)
playdough (homemade so it doesn't matter if they eat it ).

The other thing is try to think about different ways to play with the toys she has, ie nesting the cups instead of stacking them. Missy E is fascinated by putting things 'in' at the moment - pegs in the hole, shapes in the shape-o, etc. Her other complete fascination involves stepping in and out of things, a box with low sides will keep her busy for ages.