Our 8 and 10 year old son''s dives in and swims to the bottom of our 6 foot pool to collect these rings.  Living in Florida is living on water and so we want to make sure our kids are excellent swimmers. These rings are great tools to teach with; it helps develop their lungs under water, helps them learn to swim faster because it is a competition to see who can get the most rings and in a certain amount of time, great exercise for children, and wears them down for a great night sleep. The bright colors are easily spotted under the water. Oh, they even added more games with them:
1. Arm toss- One will be in the pool with arms forward and slightly out. The other must toss the ring on their arm. They count how many made it and at the end they see who is the better at aim. This is great to know if you ever need to throw a life saving device at a person.
2. Catch- In the pool one will toss the ring and the other person must catch it before it hit the water. this is similar to Frisbee.
3. Ring toss- A medium short stick or tube out of the ground, draw a line, toss the ring. The ring should be around the stick after thrown. This is similar to Horse shoes. The ring colors all have points beginning with red=5 points and up to the yellow being 30. They add them up to 5, 10, 15, 20, 25, 30. They play up to the person who reaches 1000 first (being the winner). Believe it or not this can be a hard game. I tried it and lost...lol
So there are many things you can do with these rings. My boys keep coming up with new ways of playing with them. I suggest to buy more than one set though to make it more challenging in game play, plus, it depends how many kids are playing the game for how many extra sets you would need. I been buying a set or two every year to keep or collections going.
I hope this helped. This is great for adult games at parties, kids birthday parties, family get together, and etc. The rings are multi purpose.