I sit positioned behind Ana and tickle her armpits, tummy and neck, she doesn't know where or when the tickles are coming...
http://www.clips4sale.com/store/35223
http://www.clips4sale.com/store/35223

Thank you SkulnBone7, it has been noted.
Tickling her from behind made it difficult gauge whether I was having the desired affect... I'll definitely get her sides more next time.... that's if I can catch her! 🙂