As he gets better at taking and giving, begin to slow down your reputations. Ask him to ‘Hold’ between ‘Take’ and ‘Give’. Pet him, and praise him for holding that stick. As he gets better at this begin to let go of the object briefly as he ‘holds’ it. Continue to praise and reward him for getting it right. If he drops the object before you ask him to ‘Give’, pick it up and ask him to ‘Take’ it again, or encourage him to pick it up himself.