Rainbow gems

My Sim child has an imaginary friend and I want to make him real. I have placed rainbow gem spawners (nothing happened), went behind the criminal center (nothing happened), tried to discover a potion (nothing happened). I AM DESPERATE!!!!!!! I want to make him real. PLEASE HELP!! 😕mileysad: I also got an oppertunity to bring in a rainbow gem to the science facility and they will change him for me!! But I can't find one!!!!!!!!!!! 😕mileymad: