You can always store and rotate. wink
If you can dedicate a small area for the kids toys eg a corner somewhere then put some little shelves, a tent, table, kitchen whatever in it. Keep SELECT toys that are useful. eg matchbox cars, craft stuff, puzzles, blocks/lego/duplo, train set, figures/animals etc Store these somewhere else. You could put them in boxes under the bed, in the kitchen cupboard, laundry - wherever. Everyday or every few days depending on how much you are home set up the area you have set aside with some new things. My dd has a dolls house, sometimes I put figures in it, set scenes up etc then let her wake up to it the next day. this will stimulate them to play with it. It will also keep all the other toys out of your hair. If they are all out and have access to everything, then they tend not to play with much.
the key is keeping the useful toys and ditching the pointless play once and the novelty is done ones.