宾语从句 我认为手机邮票很有趣英文翻译

手机邮票是什么?
句子翻译如下,I think (that) mobile phone stamps are very cool (或interesting).打错了， 我认为收集邮票很有趣啊哈哈,原来如此
那应该改为，I think (that) collecting stamps is very cool (或interesting).