Playing "Pooh Sticks"

If you've ever read Winnie the Pooh, you know what Pooh Sticks are...drop something in the water, then let your sticks (or weeds or whatever it may be - except rocks don't generally work) race to see which one passes by the other side of the bridge first.
Dropping it in

 

Watching for the winner

 

The girls - ain't they cute?