Simplify the following text for a Grade 5 native English-speaking person.
Original: The IOC will allow 3,500 athletes and 875 officials to participate at the Summer Youth Games , and 970 athletes and 580 officials at the Winter Youth Games .
Simplified: The IOC will allow 3,500 athletes and 875 officials to take part at the Summer Youth Games . 970 athletes and 580 officials will take part at the Winter Youth Games .