Hello ! I'm posting in search of kids bikes , Im needing one for an 8yr old girl & 8yr old boy , training wheels would be cool for the boys bike as my nephew has some learning struggles . I'd also be super hopeful to find something for my oldest who's 12 , she's tall so I'm not sure what would be suitable for her size wise . I've passed on our smaller sizes and boys bikes without thinking about it first š Thank you!