We haven't done one for the boys, but our new L3 girls did one to, in addition to things mentioned above, get used to the 'format' of meets. There is the pre warm-up, walk-out, then march to first event, talk to the judges (they are coached on how to respond to questions), then where to stand while you wait your turn, what signals your turn, remember to salute and to whom, etc. So ours went through that whole format as if it was a regular meet. I'm not sure how boys meets may differ in format from my description, but I'm sure there's still a format ;-)