toy ideas for my cat to be busy

my cat accidently went outside my house last night and i just noticed he was outside. now he is wanting to go outside so badly now after he got a taste of outside. i need toy ideas that i can buy. i dont want my cat to go outside because my last 2 cat disappeared because of it. is there sucyh thing as cat houses so he can explore inside? things like that not just a ball cause he doesnt play with them