I'll start the list then with....
Children's non-spill lidded paint pots - I have 12! In reality it's much easier to dispense small amounts of paint into those plastic trays you get in cake boxes and let them paint at the table - so that gets rid of easels too!
Tea-lights and their holders - have just put the candle in the bin and the glass holder for recycling - it has been sitting on my kitchen window-sill for several years.
Paperback books which have been read and which could be bought again if there are cries of protest from the family!