Jump In!This bright, joyful picture book celebrates a community at play! It's a sunny spring day, and the tic tac tic tac sound of jump ropes hitting the ground floats through the wind."Jump in!"Everyone lines up for a turn. The Delancy twins, double dutch divas. Leroy Jones with the hip hop tricks. Even Ms. Mabel, showing the youngstas how it's done. And after a day of fun, when the street lights start to flicker, it's time to . . . jump out! With a bold