The clam shells are GREAT cos they're nice and shallow and have nice low sides she there isn't that uncomfy hunched over the bath situation. If you have a baby bath from when she was little that could work too.

Grab some pots, some spoons, some plastic containers, take them all outside onto the patio or a covered area, fill the pots with water, and show her how to transfer water, being outside she can make lots of splashy mess!

You could get some paper and crayons and play with that... you could do some tactile stuff... dry rice, pasta, cornflour+water mix, playdough. Put the dry things in containers and make shakers. Add food dye the dry rice to make different colours, to make rainbow shakers, or glue the rainbow rice to paper. Get messy with the cornflour stuff. She'll probably try to eat most of it!

Bubbles? Kids love bubbles!

Jazz LOVES 'cubby houses' and we have a little elmo tent and tunnel that she loves to crawl though and sit in and she cracks herself up hiding in there, she's loved that for MONTHS! It still hasn't gotten old! Before we had the tent we just made a cubby under the couch and high chair hehe.