Lessons from Pingi and Crocki. Series 25. Cosmonautics day-Penguin and crocodile. They are best friends and live in the animal world, where all the animals behave like humans: they ride in buses, enjoyed a lift, live in comfortable homes. Pingi and Crocki will help children learn to count, to write, to draw. Tell your child why you should brush your teeth and do the morning work-out. Explain why it is so important to appreciate friends and help parents with household chores.