I agree with PP. Somedays it may feel like the only thing you're doing is redirecting her. Remember to use positive like "gentle hands" vs. "don't hit" whenever possible. We are supposed to tell them what they SHOULD do, not what they shouldn't. It can be hard, though, for me, even with years of practice.
Parking her somewhere when you can't be right there is an excellent idea. It seems to me that at that age, the time they most do these things is when you're feeding a baby. Your stuck, and they know it.
Don't make it a punishment though. Say something like "I am going to feed the baby. Let's go sit in your special chair and do puzzles while I do that". You can offer the other kiddos puzzles then, too (or whatever..something you have in reserve). That way, she doesn't start feeling singled out.
I don't know what your reg status is, but as a regulated provider, you cannot use "time outs" for children under 3. Of course, it's all in how you present it.
