I'm a bit of a fan of adult baby hypnosis, I've purchased tracks and had live sessions with a hypnotist. My favourite tracks to buy have come from baby-pants.com and they've been very effective. I happen to know the lady hypnotist who made those, and she has given me permission to distribute two free files she's recorded. They are supposed to help you feel regressed to childishness for a short time. You can download them here:
toddlerism.com: Adult baby hypnosis files
I hope you like them.