Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mattel Hot Wheels Slimecano Defects

This toy does not work:1. Parts do not fit well together, are misaligned, and come appart, particularly track pieces, resulting in cars not being able to complete circuits around the track.2. Many Hot Wheels vechicles do not fit under and through tunnels and obstacles on the track.3. The spring-loaded "launcher" is too weak to propel most Hot Wheels vehicles up and around the track.4. The "slime" provided with the toy comes with warnings that it causes stains and should not be handled. Furthermore, the track, mountain and cars that come in contact with the slime need to be cleaned afterwards, causing rust on metal parts on the cars (e.g. axels), and the plastic mountin and track are full of crevices and irregularities that can't be easily cleaned.This product is poorly designed, poorly made, and has been frustrating to our three children. [...]