Define "Helpful"

Today, while I was washing dishes, Weston announced that he was bringing me a surprise. I couldn't see him from where I was, so I didn't know what he was bringing. The next thing I heard was: "Oh no! I just spilled your surprise all over the floor." At this point, my curiousity peaked and I made my way to where he was. He had been bringing me a box of playing cards, and sure enough, they were all over the floor. "That's o.k." I said, "Just pick them up." He worked for a while and then declared that he couldn't do it by himself. "No. You can. You're doing a great job," I assured him. He beamed at this and replied, "Am I really helpful, Mommy?"