cooked spaghetti play, add different colours using food colouring to small amounts, then get them to mix. can take prints with paper on top.
rice play, can be coloured with food colour, add small objects, letters , numbers.
chalk numbers or letters on tough tray, add in middle cup of water with ear buds for writing practice.
clean mud, grated soap and ripped toilet roll, add water to form mud.
tea making. use selection of different sized tea cups and tea pots, and warm water and real tea.
spice grinding is a good one, avoid chillis, we have selection of pestle and mortor and they select different spices to grind and smell.
fresh herb grinding < we grow in garden>
citrus juicing, we have plastic juicers from poundland.
collect buttons, ask parents to donate, or buy from car boot sales etc, and then get the children to sort by size or colour and count etc.
keys are another with padlocks.
just a few ideas from top of my head.