Slime provides a kind of 'sensory play', which helps to engage a kid's senses, stimulate creativity, and can have a calming, in-the-moment effect. It also triggers their curiosity – the gooey texture of slime occupies a weird middle ground between solid and liquid.
Slimes are fascinating creatures that appear in many fantasy games and stories. They are usually depicted as blob-shaped beings that can change their shape and size, and have different colors and abilities.