Onit, please don’t give in to him. He’s blackmailing you, manipulating you, this will be the thin end of the wedge if you let him off the ‘mundane’ aspect of the contact he DEMANDED. He will ask again and again and again. Always expecting you to suck it up so he gets the easy, fun time and you do all the hard work. He knows you will always think of the kids first, unlike him (the selfish bastard).
But the best thing for your kids is routine. Normal, regular, consistent time with both their Mum and Dad, doing normal, regular stuff. This includes hanging around, having a snack in a cafe while waiting for whatever. Tough tits if this doesn’t suit him. He needs to suck it up.
He wanted this time, he’s got it. Court ordered. His time to manage, arrange and be available for BOTH his kids. His responsibility. Not yours. If he pressures your kids to drop their activities to suit him, they will know and they will judge him for what he is. They will be ok ultimately, because they have you.
If you deviate from the Court order, it sets a precedent. He will grab it straight away and use it all he can. Don’t let him.
He is a total shit, by the way.