when you are at the turtle part, sort out the zoombinis. after you have done that, look on the log and place the first one on the first turtle. then put the rest of that kind on them. do this with every kind.
On the cube part, when you have to click the buttons for it to move, Click the first one, then the second one, then the first one, then the third one, then the second one and then the first one and you get all your zoombinis through.