The Growing Skull!
Place it in a container of water (jar, bucket, bathtub)
and watch it grow!
This compressed sponge begins at 2.5 inches across
by 3 inches wide. As it soaks up the water it expands
to 600% its size!
The fun still continues, simply remove the skull from the
container, and it will shrink back down. Place it back in the
jar and watch it grow again! Sorry jar not included.