How to let my son know I'm better than him?

My son is 6 and he thinks he's better than me! It all started about 3 weeks ago a party i was playing him in Foosball, he beat me 10-7. I shouted at him because he cheated by "spinning" Next game he didn't spin at all, but somehow cheated and beat me 10-3! Then the next night i challenged him in a racing game, I tricked him into picking the worst car in the game, he still beat me. Last week before a family bike i unscrewed his training wheels without him knowing, about 5 minutes into the ride i challenged him in a race. I took off a head quickly, I thought te race was mine for the taking. His training wheels came off, although he rode right past me anyway, I was so humiliated. Then tonight he has his birthday party, the kids were having a soda chugging contest, I entered, I poured some Nightquil in his soda, however it didn't work he beat me..... How to i show him im better! and if not where are some fairly priced boarding schools in Utah?