What kind of thing is he interested in Oubliette?
I have had THE longest day. DS' best friend's mum asked me to pick him up from kiga because she is ill. I offered to keep him until dinner, because she is pregnant and sisterhood and such. And it was fine, I didn't mind at all, but by god, those two are tiring when they are together. DS' friend did a monster poo and we got accosted by a homeless man and my excuse that I don't speak German was quickly assauged by the ever so helpful children so then I had a homeless person badgering me through children to give him money to eat because he's a catholic and not an alcoholic and I'm like, um, could you maybe ask somebody who doesn't have two small children with them?
Then had to fight off questions like "How much money does he need? I have some, I can give it to him!" "Why aren't we allowed to talk to that man?" Actually he came across quite genuinely and I felt bad but seriously? Would you approach someone with two children?
Then had to herd two blood sugar crashed whirlwinds through the supermarket, who thought it was super fun to run in circles up and down the escalators. And yes I was "that parent" and didn't give a shit when they dumped random products in random places, because TBH, I was just glad they weren't bumping into doddery old people or big displays of expensive wine.
Eventually got out alive. Got home and after playing nicely for a while DS announces he wants a poo, and then has absolute utter meltdown screaming fit at me because he thinks he's missing out on the really fun activity of choosing a DVD. So ends up losing various privileges until I remember to do the parenting book thing at him and start saying "Yes I can see you're really mad at me. You're telling me you don't need a poo. You want to choose the DVD." and the friend is saying all concernedly "I think you should listen to your mom and go do a poo!" 
Anyway. Jeez. They eventually calm down until the friend pulls DS' hair because he won't give back a bit of toy. I micromanaged and then their dinner was ready and then finally I could drop him home (on the train, because we don't have a car, and with DS, because DH wasn't home yet).
Oh and DS taught his friend "bitch". But I don't think he realised that he'd said a bad word so maybe that's not so bad 
It was DS' bedtime when we got home thank god 
But DH was ver unreasonable and didn't buy me beer ready and waiting.
(Sorry for the total off topic rant. Please resume usual service!)