First, I gave Arin a piece of craft foam (when I did the project as a kid, we used construction paper - I recommend the craft foam). She colored the foam with markers. She used the green marker to make dots. I asked her what she was making. She said "Dot grass." Then, she made dots with the blue marker and I asked what she was making, "Blue dot grass!" Silly little girl.
When she was done coloring, I cut out a triangle from the foam. Then, I cut two small slits in the triangle and I threaded a popsicle stick through the foam. Then, I gave Arin a bar of Ivory soap (it floats!). She unwrapped the soap and stuck the popsicle stick sail into the soap boat!