If breaking the laws about destruction of currency is too much for you - or if you really can't bear to part with a few dollars - burning some scraps of paper with dollar signs etc written on them would be good enough!
If burning a piece of your own fiat currency is too heavy for you because the government doesn't approve, then you might want to avoid Bitcoin entirely
Well the problem I have with burning fiat currency is that being an act of quantitative tightening, it makes other fiat instances ever so slightly more valuable!
Perhaps fake-note burning really is too tame for a Bitcoin celebration, but I was thinking of grandma & the kids.. and how to celebrate inclusively without too much shock value.
Hmm.. how pussyish of me!
If you place Australian notes in a 200 C oven do they shrink to mini notes? You could then deface currency and have a half sized note at the same time.
Let us know how it goes. Instructions for doing this with chip packets here: http://www.madaboutscience.com.au/store/index.php?main_page=page&id=45
Do they blend ? Yes they do!!