Here is how M&M are a mixture,
Homogeneous-of the same kind; alike.
Heterogeneous-diverse in character or content.
Here is a video of homogeneous and heterogeneous.
Solution-a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).
Suspension-the action of suspending someone or something or the condition of being suspended, in particular.
Apple juice is a example of solution.
Colloid-a homogeneous, noncrystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; the particles do not settle and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.
Whip cream is a example of colloid.
Here is a video about solution, suspension, and colloid.