Can you try a game for picking up toys? "Let's see how fast we can pick up the toys!" or "Let's see who can pick up the most toys, Pie or mummy!"

Is she old enough to reason with? I can't see her age sorry... But my DD is 2yrs 4mths and I say to her now "if you don't do X, we can't do Y" so when she has had enough with the toys and wants to do something else, I say " if you don't help mummy pack up these toys, we don't go outside to play with the sandpit."

Or "help mummy put the shoes back in your room and then we can have afternoon tea. Just give mummy a hand and we will be done in no time."

As long as it's something she wants to do, she's generally happy to help me before moving on.