First and foremost, I wanted to say what a great community AtoZTeacherStuff has here; very impressive. I am currently enrolled in an Early Childhood Education course and I have to create a science lesson plan for children who are in preschool. I have decided to go with a "sink or float" experimentation, but when it comes to "Ethnic/Culture" in the lesson plan outline, I'm not really sure how to incorporate it. Should I ask the children to bring something appropriate (not valuable) from their ethnic background to see if it will sink or float? I am just completely dumbfounded when it comes to this section. Any help would be greatly appreciated.