My favorite play kitchen is a real one. From about 18mo onwards kids can help in the kitchen doing age appropriate things. It teaches sooooo much (fine motor, gross motor, following instruction and instructions, pride of accomplishment, working independently, teamwork, planning, imagination, plus all the sensorial schtuff/practice), not to mention grinding in good habits young (cleaning up after yourself, helping family, chores of daily living / that they are so normal as to go unnoticed OR can be fun), plus family time, and as a long term bonus: a useful life skill.
As a toddler having my son help me slowed me down a little... but by 4 I could assign him a task that would save me ages of time... and by age 8 with minimal supervision he can actually cook almost anything I can. He's been asking if he can have a "night" of his own... but I've been procrastinating a bit on that. But he HAS been making his own breakfast for a few years now, and sometimes mine as well. I cook 3 times a day (brunch, lunch, dinner) and having his help is actually an *enourmous* help. In planning, shopping, prepping, cooking, and cleaning up after.
<grin> I mean, why buy a pretend one, when they can do the real thing?