Everyone loves playing with a ball. You can toss it, squeeze it, roll it, bounce it... but this particular ball has a whole bunch of neat extra features which come factory-standard and pre-installed for your ball-playing enjoyment. It's called an Inside-Out Ball because you can turn it from a regular spherical ball into a spiky sea urchin by turning it inside out. Plus it is very squishy and glows in the dark. All that for the low, low price of $2.75 USD.