We do "rest" time during our youngest's naptime. The "big" kids have to stay in a room and do puzzles, read a book, leapster, listen to music, etc. We have always done that as soon as the child's nap season ended. Now we do school during naps too sometimes because it's so hard to have relative quiet when our youngest is awake and busy. You just adjust to every new stage in your family's life. Always be willing to change things up a bit to make it a good fit for everyone.