We did not see the need to buy the pen that costs more 36.96. The announcement is very well written and it confuses you. The plastic globe cost him 32.99 and it is a rip off. The price for just a piece of plastic, it's a shame. My son was totally disappointed and I never buy this pen at this price. Really, when I see the title "Interactive Globe," I am outraged. I thank neither Amazon nor Ravensburger.