Well, what would suit February 29th better than leaping?
You may never get as much cooperation from your kids.
Here is what to do:
Set the shutter speed high.
Set the camera to continuous shooting.
Get down low to exaggerate the leap but also keep the ground (or picnic table) in the photo to give perspective.
Share what you got in the Familiar Light: Try It Flickr group. (Today there is also a leap group on Flickr.)