The activity walker is by Fisher Price, I have one and my son still loves to push it around. He even loves pushing his big sister's cheap-o Walmart shopping cart around, too. When you start looking for something, just be sure the wheels are not too lose that it slides away while she is pulling up. That was a problem we had with the shopping cart.
While you are at it, now is a good time to make sure you have plenty of safety gear as well. Safety gates, lock your cabinets and drawers, put covers on your door knobs. Hide all your power cords (they have radar for finding these!). Make sure nothing can topple down in her head if she uses something unusual for pulling up.
I hope this is helpful. God bless you!