To make this at home:

• Hang a bucket on a short string from a horizontal limb. We used a pipe, but you can also use a tree branch, broom stick or your child's swing set.
• Attach a string to the bottom of the bucket, loop it through a pulley (from your local hardware store) and attach it to the handle of another bucket. At this point there should be 2 buckets hanging in the air.
• Fill the first bucket with water.
• Have a friend sit under that bucket.
• Throw a beanbag into the empty bucket until it pulls the water bucket over and dumps it out!