My son just started JK in September and is in school from about 9-4 every day now. While it has made my life ever so much easier truth be told...he gets jealous when he hears about the fun things the daycare kids and his sister are doing with me while he is at school. I try not to mention things in front of him, but sometimes it comes out and he is upset and doesn't understand why he can't come to the park etc. I am planning a little Halloween party on the 31st and I am sure he will find out as it will be hard to hide...I know he'll be doing fun stuff at school too, but don't want him to feel left out of our party. Those of you who have young school-aged kids, how do you deal with this sort of jealousy from a four year old who only sort-off understands why he has to go to school in the first place?