Is Deniz the type to go to a "special, exciting, fun class that's just for older kids" by herself for an hour? or would she insist that you stay? How about if you were right next door? If she's fairly independent, and willing to sit in the class alone, you could take Ana or whoever else you're with downstairs to do drop in art, or to another area. Most kids are OK with their parent/sitter leaving, especially if they know where they'll be. Also, in general the younger kids are asked to leave during the lesson, but can come back for the art part...so Ana could probably use the crayons or whatever while Deniz is doing her thing. the educator could tell you when it'd be OK to come back.

I hate when parents try to make their kids leave, and the kid is having a ball! "come on,let's go see clifford!" "but mommy, I LIKE dora!" "no honey, mommy's bored. let's go"...um yeah. Lady, this day is not about YOUR boredom level. seriously. It's one thing to say "let's take a look around, and if you don't like it better we'll come back"...sometimes kids don't know what else is there, and you know there's something they'd like even better. But if they really do truly like that room better..let them stay! Unless it's closing for the day, there's really no problem.