All that is needed for this activity is a used soap pump, a tub or large bowl and a towel for under the tub. Fill the pump container with water and place it in the bowl for the toddler to practice pumping with.
It took a little practice for my daughter to learn the pumping motion but she was successful. She used it for a few minutes, but not as long as the pouring activities, I think because it takes a lot of arm strength. Despite this, it's a keeper for her activity shelf, and I think as she develops more she will really enjoy it.