Gifted Issues Discussion homepage Forums Age or Ability Specific Forums Pre-school Good things for my 4-year old to take apart?

Others have mentioned items to avoid (those which could present safety hazards), and I'll join in on that theme.

While batteries are quite common, almost omnipresent, they can cause injuries. Cylindrical batteries, button batteries, and rectangular batteries each present potential problems, ranging from accidental fires, to ingestion injuries (related to button batteries), and acid burns.