To help my step son Caleb

I am doing this for my step son Caleb. We recently had a break in end of December  in our communal flats. Where I have CCTV my stepson was watching the cameras as the breaking happened. He had spotted one of the men wearing a Halloween clown mask which has left him little bit traumatized, struggling to settle, nightmares at night-time. If I could afford myself I would take him the trips and buy him some lego to help him take his mind off of what happened. I try my best at the moment but what a step dad is not that easy when I have a spare bit of money I do spend it on him    thank you for any help.