hi travel agetn- yes we did go to ocean world, but we did the encounter which was fantastic it costs $100 - you wont get it any cheaper as the price is set be them, this includes you lunch ,but no drinks, and your return transfers, there are return coaches at 10.30 and 12.30 as well as your normal allocated drop off. the phots etc aren't too dear. we also did the monster truck safarai, horse riding, fishing and went into puerto plata and various diff areas and went througha haitian village-very upsetting.
take lots and lots of pencils, paper, crayons, girlie stuff(bobbles) boys stuff (carsetc), sweets, cheap flip flops(if you can find them). just lots and lots of everything

hoard the toiletries you get in your room.
if you email the hotel , make sure you follow it up with another one just before you go. if you tell the hotel when you check in you are celebrating a birthday they may arrange extras for you. but also if you go to ocean world let the coach rep know and they may do something also. a littl girl had a b'day and they arranged a sea lion encounter for her.
hope this helps. but please have a look at the isaira tours website, we booked everything thrugh martin when we arrived and he is wonderful.