Yes, you can transfer to a cheaper age band.
You will be able to do this from your account on a match-by-match basis, removing the need to meet face to face to pass the ticket to them.
From your account, click ‘Tickets’, select the game you would like to transfer and then click ‘Transfer Ticket’
You will be presented with a drop down menu that asks you to select ‘New Price Type’. If you would like to transfer to a cheaper age band, leave the ‘New Price Type’ as an Adult. This will then allow you to transfer.