Bake a batch of cookies, and let him have at them with a container of sprinkles. (babycenter.com)
Of course, it can be abused by certain players, but if they want to spend hours upon hours on an easy map building points let them have at it. (simhq.com)
The «let's have at em lads» school of tactics was very limited and teams were always found wanting in the Champions League and World Cup despite the obvious talent available. (spursfanatic.com)