Just back from Bangkok & Pattaya yesterday. I would recommend the followings:
For playing (in Pattaya):
1. Swim with Dolphin - my kid and his friend enjoyed it very much
2. Art in Paradise - can spend over 2 hrs there to take pictures
For eat:
If you love shabu-shabu / sukiyaki / beef or pork, I would recommend to go to Mo Mo Paradise in Bangkok, 399.- Baht / person for all you can eat beef & pork in 90mins, just add 39 baht with unlimited drinks, total include tax is around HK$130/adult, age below 11 is only 199 baht/kid. I went to Mo Mo Paradise in Tokyo & Taiwan before, the one in Terminal 21 (Bangkok) is good as well. You can also find Mo Mo Paradise in Central World.
泰國竟然有我至愛的Mo Mo Paradise - sukiyaki 壽喜燒