Keep the family smiling and laughing all afternoon finding out the effect of different sized asteroids hitting Earth. Your can type in the size of hypothetical hit, the speed, angle of entry, your location at the time of the blast, and even the type of rock (you want porous or density with that asteroid?).
Depending on your data input, additional analysis will be available in pop up boxes, where the family can add terms such as "ejecta" to their daily vocabularly, without referencing to nasal spray technology, as in:
"At your position there is a fine dusting of ejecta with occasional larger fragments."
Have a great Christmas day!