[[WMG:''No'' special effects were used at all in their videos.]]
What? This is WMG, after all. I ''do'' have a small theory on just [[SpecialEffectsFailure how this is possible]]...

Which is...
[[WMG:These guys live in an AlternateUniverse or a PocketDimension where most tropes (like DeathIsASlapOnTheWrist and RuleOfFunny) all apply to them...]]
Most likely the Internet.

[[WMG: The birthday cake in "PARANORMAL EASY BAKE OVEN!" was made out of several smaller cakes]]
With icing coated around it to make it look like it was one large cake, explaining how the Easy Bake Oven could make a cake larger than it.