Insufficiently heated = cold
Insulated electrical wire = cord
The middle of an apple = core
Additional items = more
A female equine = mare
An article of commerce = ware
An imperfection = wart
Hotter than temperate = warm
You have a very large number of generic plastic building blocks, each in the shape of a cube.
Think about how many cubes you would need in order to construct a giant cube with 16 small cubes along each edge?
If you were to then remove the outside layer, how many small cubes would you have removed?
Hint: Two animated characters' names have been merged.
From Wallace - Wallace and Gromit, the names have been merged.