Dh and I are currently umming an ahhing about this. DS and DD go to an afterschool club which is about 2 minutes walk from home. He's the oldest one there (he's P7, due to go to high school after the summer holidays), and has been complaining for some time that he's bored. He's asked if he could let himself in after school on the 2 days I work - he would get home around 3.45 and I'm in at 5.15. We live in a very quiet cul-de-sac with neighbours and friends around if necessary, and he knows not to answer the door/phone or use the cooker. He'd come in, do his homework, set the table and watch TV.
He's a very sensible 11 year old, and has been left on his own for short spells already but this seems like a big step. Yay or nay to this, do you think?