First things first: ALRIGHT! I was wondering if Puppet Max was ever going to acquire a hat like Cartoon Max, so this is exciting!
Secondly, I'm not sure, I'd think the hat would fit snuggly enough you wouldn't have to worry about something like that... MAYBE velcro, I don't know... I don't think Scotch tape would have the strength to be able to keep his hat on, and I think if you tried to use double-surface tape, it might ruin the material if you tried to peal it off after a while.
Yeah, I know, some help I've been huh? Maybe I've been watching too many of your drinking crap videos!