A little push in the right direction.

I want to set up a form for data entry with 3 or 4 combo boxes. box one
would be driven by a table that contains the options I want people to choose
from. Box2 - 4 would then need to be relevant to what was selected in box1.

i.e. If the user selects "Hat" in box1 then I need box2 to show,
cowboy,baseball,stocking... and box three to show size7,8,9...

But if the user selects Wrench in box1 the box2 should show,
crescent,open-end,socket... and box3 should show what is relevant to what
was selected in box1 and 2...