If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Ouch! Sisi's in trouble. She's got a lot of work to do, and there's nobody there to help her finish in time. The job is to sort out some books, so that she can put them by categories right back in their shelves, where they belong. Do you think you could take a break from your activities, and start helping her out?!
Use your mouse to interact