New York Helicopter

i went to New York in 2006 but apart from going on tour buses and seeing the general sites, shopping my poor little heart out, watching many musicals on broad way and the odd helicopter flight around the statue of liberty i found nothing else to do there.. and within 3 days i got bored.

now my mum wants to have another trip to new york but i don’t want to do the exact same things .. because its boring.

what exciting things are there to do in New York for a second time visitor???