My DH does triathlon, and our son did 1 so far. Many kids don't have specialized equipment. A lot of kids just use their regular mountain or hybrid bike. But, if your daughter has or can borrow a road bike, she might be better off. (If the bike course is on a paved surface. If it's off road, obviously ignore that suggestion!) If you do borrow a road bike, make sure the pedals don't require clip-in shoes. If they do, ask if the owner has regular pedals she can use, as using clips takes a certain amount of practice to get used to.
Where will the swim take place? Is the water warm enough for swimming? If so, all she'll need is a suit that won't slip off (most girls seemed to wear one piece suits). If it's cold, she might want a wet suit, but I would look around to borrow one. She should practice getting in and out of it as well as swimming in it before her race.
Let me know if you need more info! I'll try my best to help. Good luck to your daughter!!
Is she doing a kid's/youth triathlon or a sprint triathlon? She might want to try a kid's triathlon or two first just to get the hang of it. They're still highly competitive, especially the Iron Kids series. The swim portion of a large sprint triathlon can be a bit unnerving to beginners.
Thank you so much! This is very helpful. I am trying to track down the water temp. It's usually about 65 degrees, but it's been really warm lately.
Here's a suggestion for helping her in the transition area:
Tie a balloon or bright ribbon to the rack where her bike is. Upon entering the transition area from the swim, it's easy to lose track of where your bike is, especially in a large triathlon. That will help her zero in on finding her bike and also finding her place when she comes in from the bike portion. Also, put a small square of carpet or towel by the bike with a dishpan of water by it. When she runs into the triathlon area from the swim, her feet will be sandy or dirty. She can dip her feet in the water and put her socks and shoes on without having sand on her feet. That will make for a lot more comfortable running.
The other thing is, is it ocean or lake water? Swimming in the ocean is very very different than practicing in a pool if she does.
Is the run on pavement or beach? The run leg of the tri my son did was on sand, and he'd never run on that before. Unfortunately, some of the path that was marked off wasn't on the packed sand, so it was a real challenge. Many kids ended up taking their shoes off to run.
200M is not a long swim, so I doubt a wetsuit will be necessary.