We have 2 plastic kitchens (both found on the side of the road!) with lots of wooden spoons, bowls etc from op shop,s wheelbarrows, one of those plastic climbing cubbies but it hardly gets used, and a sand/water table that gets used the most. I want to get a cubby too but we are planning our yard first to see where it will go. Mine both love swings so I have deliberately not got one for the yard so that the park is a fun thing to do!
Mine love to get dirt, sand and water and mix it up with lawn clippings - and then make mud cakes. Hours of fun and it's cheap!
ALso have bikes, scooters, a trampoline, balls and trucks that all get used a lot!