its very cool!
B.T.W; crisp is chips in british slang (sorry to you americans out there)
Step 1: Step 1
Step 2: Step 2
If you require it to be smaller insert back into oven for extra 2 mins at time.
repete as required.
Step 3: Step 3 (optional)
first you need to get a paper punch/hole punch.
create you'r hole on one of the corners at least 7mm from any edges (packet may grow/shrink a little after a while)