I have lanes and lines, but no cars drive here. People can compete here. What am I?

I fall silently from the sky and cover the ground in white. Children love to play with me, but I melt away in the warmth. Solve the riddle → I make small things look bigger and faraway things seem closer. What am I? Solve the riddle → I am a big, colorful ring, but I have no finger. You spin me around, and it's fun for a long time. I spin around your waist, a bouncy, wiggling friend. What am I? Solve the riddle → Without arms and legs, I still show you the way wherever you want to go. What am I? Solve the riddle → You can always see me far away, but you can never reach me. What am I? Solve the riddle →