Help! Help! Help!

I'm Petya Perestukin from the fourth class and I beg you to help me!!!
It's spring now. It's sunny and warm. All my friends are playing outdoors but I can't. I have to stay at home and study as I have a lot of bad marks. It's unfair! The tasks are too difficult. It will take me ages to do them. Help me, please!

If you are ready to give a hand to Petya Perestukin click the button "Start", do four tasks and then have fun.