Quote Originally Posted by Antonio1986 View Post
1. All his money are invested in safe financial products -> Все свои деньги инвестированы в безопасным финансовым продуктах.
The participle is OK.
The using of pronoun «свои» is incorrect here. You should say: «Все его деньги инвестированы…».
After «инвестированы в» accusative should appear: «…инвестированы в безопасные финансовые продукты»

Quote Originally Posted by Antonio1986 View Post
2. The children are amused by the cloun -> Дети развлечены клоуном
«Дети развлечены клоуном» is “The children have been amused by the clown”. Though the phrase sounds very strange.

You shouldn’t use the passive participle here. An active verb is better:
“The children are amused by the clown” — «Детей развлекает клоун».
I don’t know why…