HM Diffuser

Is there anyway possible to make a homemade diffuser?...and just the diffuser peice becasue i have like 3 dryers, but no diffuser attachments. I Kno its cheap and i can find them anywhere,but my mom won't take me to get one and say its just a waste of time and I can't drive yet. So ya it'll be onee big debacle(LOVE THT WORD) anyways...any suggestions are helpful. Oh yeah, 'members "homemade" THNKS:help:
CG..yep that's me!