To start the unit, we are going to do the Circle Floor Pat, (this is a glorified name for "simon says sit on the floor and pat the floor") :)
Here's what we did:
Have students sit on the floor in a circle--criss cross applesauce. Lead them in patting the floor with different forcefulness levels: very soft like touching cotton candy (or petting a puppy), hard like squishing a bug, and in the middle--normal. Vary between these and use the words hard and softly to describe how much force they should use when patting the floor.
The girls loved the "petting-the-puppy" soft pats and the boys loved the "squishing-the-bugs" hard pat. It was a win-win situation!