Just like adults, children also have to go through the mandatory checks at Schiphol. Therefore, you also need to queue up with small children. We cannot help you get through the queue faster with children, so prepare them for the wait in advance. The airport has free Wi-Fi, so you can play games and watch videos on your phone or tablet. Bring something to eat and drink with you. And only pack the essentials in your hand baggage so that you don't have to carry too much (and to save time at the security check too).