It is not obligatory, but you can give whatever you want. You can bring something special that describes your country. Spring has come, but weather is very cold in Russia. That is why bring warm clothes. I suggest you to go very famous places in Russia. I have list of places such as Kizhi Island, St. Sophia Cathedral, Lake Baikal, Suzdal, Moscow Kremlin, Hermitage Museum, Bolshoi theatre, Moscow Metro, Kuskovo Estate, Central House of Artist and Saint Basils Cathedral. These top tourist attractions in Russia and l hope the trip will leave unforgettable memories for a lifetime.