Picked up this phone mount for a bike for my kids. Not sure which one will want it, but it is the same style my husband and I both have on our bikes and works great for keeping your phone secure and in front of you. We use the Map my Ride app, and this allows us to see our speed, distance, etc. without having to worry about keeping out phone in our hydration bags. My kids listen to music instead of watching their phone, so I think this will help them out with being able to easily move from song to song when they want to change it. It is easy to attach, easy to use, and very secure. No worrying about your phone falling and breaking.
Get yours here: https://amzn.to/2MRKkLC