Roll of lining paper or old cardboard from a fridge or bike, child lies on it, draw around them and produce an outline which you then "dress" with real clothes or draw on clothes. If toddler has an issue with dressing, you can lay out the clothes for the next day on it.
"Fishing" for ducks or waterproof toys in the bath with a net on a pole from the seaside.
Creating a den by using duvet covers over a solid table or a large cardboard box.
Searching for, and collecting things, that you have left around the house in different categories of colour or shape eg find five yellow items, or five tsquare items and bring them back to put in a box or bucket. Then combine the two: find five yellow, square items etc.
Find the teddy bear: follow a trail of large buttons or upturned paper cups to find the teddy hiding in a cupboard or under a bed.
Lay out a plastic tablecloth + some small pans and lids, plastic bowls, a plastic plate, and cup, some measuring spoons, a wooden spoon, some dried beans or pasta shapes or green lentils and let them amuse themselves while you supervise from a distance.