.Some kids are active and some are static. Sometimes it is just impossible for the active kids to do the static things, and vice versa. So it is best to always prepared two kinds of activities and let the children choose on their own, like today. On the other hand, this technique is often used in selling. Would you like to buy the $4 pencill or the $5 pencil, you might want to buy the cheaper one.whichever you choose, the thing that matters is that you bought.