Guineveretoo
Mostly bewildered
I went there for my holiday last year 
As well as all the things already suggested (and I loved visiting blackgang chine again after it was dark), you may also wish to...
Play miniature golf.
Play crazy golf.
Play on the slot machines (I won a toy car which I refused to give away on the grounds that I had never won a car before) and air hockey.
Visit the zoo.
Avoid the crinklies (this bit is tricky, because their coach drivers seem to sense the next place you are visiting, and to get them there just ahead of you).
Don't bother going to the pearl farm place - it's a rip off and full of tourists and crinklies.

As well as all the things already suggested (and I loved visiting blackgang chine again after it was dark), you may also wish to...
Play miniature golf.
Play crazy golf.
Play on the slot machines (I won a toy car which I refused to give away on the grounds that I had never won a car before) and air hockey.
Visit the zoo.
Avoid the crinklies (this bit is tricky, because their coach drivers seem to sense the next place you are visiting, and to get them there just ahead of you).
Don't bother going to the pearl farm place - it's a rip off and full of tourists and crinklies.


I'm glad/sorry I've only just seen this thread. I could have given you loads of things to do!