What to do with the baby?

What do you do with your preschooler and the baby while homeschooling your older kids? Usually we get it all done while the baby naps, and while the preschooler is cutting and gluing and making messes everywhere.. Today he woke up earlier then we were ready for. So the baby joined us... And ate us... Yep, he crawled right under the table and tried to eat our toes....