Slime has different expert levels that are dependent on slime type and the person using the slime. For example, if you have a warmer body the slime will melt faster and you may need more activator. However, that will not affect how you play with it! 

Slime can relieve stress and be very relaxing to play with! 

Thick & Glossy is great for poking, popping, and bubble making.

Butter is smooth and soft, and known for butter! It's a favorite to all as it is less sticky. 

Clear slime is good for bubble pops, stretching and poking. It melts faster so it's a little more difficult to play with.