Gypsy: I thought I might give you more details to help you understand how the travellers cheque would work.
At the post office, they will have you sign your name in the upper left hand corner of the cheque. Typically, when you wish to spend it, you would fill in the payee line, and then sign the cheque on the bottom right hand side.
In this instance, prior to posting it: You would make out the cheque to your recipient and sign the bottom right hand side. When they receive it, they would simply deposit it into their bank account. If it's a child and they have no bank account, they simply sign the back of the cheque, endorsing it to their parent, who then encash it in the same way.
You avoid all of the exhorbitant fees charged by western Union, plus you have no necessity to post via the more expensive forms of delivery.
I wish you well
Fr. Bill