At four, my opinion is that the answer is, "not much." Items a kid that age should be working on to develop their EF would include:

- Dressing themselves - with adult input for weather conditions/planned activities
- Hygiene (teeth, self-bathing, washing up before meals, etc)
- Small chores (feed a pet, return their dishes to the sink, gathering their laundry, etc)

One item outside the norm we used with our DD was that, as we travel often, we put her in charge of gathering toys/activities she'd like to have along for the trip. If she didn't grab it, she didn't have it.

I'd also suggest that electronics are a sneaky way of teaching this, because gaining access to the materials the child wants involves a process of some sort, no matter what kind of device we're talking about. If your 4yo can locate a game disc, power on the console, power on the television, switch video inputs, activate the console remote, navigate the on-screen menus, and launch their game, their EF is quite advanced.