We also unschool, or life learning. So it's going on all the time. But I make an effort to spend 1 or 2 hours most mornings with DD 10. Usually reading to her, but sometimes baking, or some other project. We also are working on our drawing and handwriting skills so that we can start nature journals soon. In the evening after dinner, she and I usually play a game or draw or do handwriting. Sometimes watch a movie. Before bed Dh reads to her. In addition she has drama and singing and dance lessons. All her choices. Lots of learning goes on when she and her friends play. They play store, castle, house. It all has learning value.
The 4 yo I spend time playing with math or letter manipulativeswhen she asks. Maybe once a week. She also goes to dance class, and playgroup ( mainly to play on the junglegym- no city parks here). She gets read to before bed and at other times when she asks.
They both spend lots of time on the computer. DD10 has cd roms that are great for learning. She also writes frequently. DD4 lays in word, typing out her favorite letters.
A pessamistic outside observer might think not much schooling goes on here, but I can see the changes in them. It's amazing. And John Holt is right: when it's child led learning, it's much deeper, more significant, and it sticks. When I try to force something she backs away and doesn't want it. I'm trying to sneak the times tables in right now, without forcing memorization. Slowly but surely.