CS Unplugged
First we should explain children things related to computers, via games or videos and then we could use this type of exercises to know if they have learned something. Another way of integrating this type of exercises could be by giving them for example at first one in wich they have to draw how they think the inside of a computer is and then show them a picture or drawing of how the inside is in reality, this way we can know the level of knowlwdge they have about the topic