Dd is 2 and we have started cooking together. Well, i guess i mean " cooking" as there's still lots of off limits stuff like knives, heat, cheese graters, etc! But she lives to dump and stir and then look in the oven - i am going to burn out the oven light - and proudly proclaim, "Me help!"
I used to love playing store and we inly used whatever was laying around - no special toys involved.
Flashlights - chase the beams around or make finger shadow puppet things