kingdragonfly: Regarding undercounter microwave, be careful of letting kids heat stuff up in the microwave, in particular hard candy, to soften it up.
The microwave can turn the insides into molten lava, while leaving the outside unmelted, or worse explode when picked up, bitten into. There have been cases where children were burnt bad enough to have permanent scarring.
See the ancient Mythbusters S02E12 Exploding Jawbreaker episode
There also the rare superheating of liquids that could cause scalding.
My mother had significant eye injury from hot liquid exploding in a microwave.

