I wasn't looking for anything specific; I had mainly accepted my friend's invitation to get out of the house and leave my children with the housekeeper. Sometimes I need to do that.
While strolling the aisles, I saw a scrub brush on a long stick.
"Hmm," I thought to myself, "our back patio is pretty dirty. And even though it gets hosed down every fed days, it doesn't do much to actually get the dirt off the deck. The children's feet are filthy every time they come in. That place really needs a good scrubbing."
A few hours later, I walked in the door and called out to the girls. "I've got a present for you! It's so exciting! And I bought two - one for you Sophia and one for you Kathleen. Come and see!"
Within a matter of minutes they had filled a bucket full of water and were contentedly scrubbing away. "I can be Cinderella," Kathleen informed Sophia. "And me too!" Sophia replied. "Yes," I told them diplomatically, "you can both be Cinderella. You're twins."
I went inside and started dinner. A few minuted later, Sophia came in howling and sobbing, "Edwin! He stole my brush!! And he won't give it back!!!" I quieted the tears by giving Edwin a mop and all three went back to work, happily scrubbing, while I enjoyed cooking dinner without any 'helpers.'
Moral of the story: anything is fun if you can present it as a "surprise."