Last year, Mordechai (age 5) had a difficult halachic question. He wanted to know if he could play with a little handheld electronic game on Shabbat if he doesn't turn it on or was it still forbidden because the item is normally muktza. I directed him to Dovid (30). Dovid said that he wasn't sure and that he would have to check with the rabbis in yeshivah. Mordechai responded with the suggestion: "Or you could just look in one of the books!"