This paper presents the design and evaluation of a mobile phone interface with and for children. Ten children aged 8-13 years old took part in a participatory design process and ten others evaluated the design. Whilst there were similarities in the problems and desired features children and adults share, children had some unique requirements and preferences, such as cartoon-styled icons or placing access to emergency number at the home screen. This study enlists some requirements of mobile phone interface for children. The methods used in this study can also be adapted to other design and evaluation processes with children. Keywords Children, mobile phone, cell phone, participatory design, user evaluation ACM Classification Keywords H5.m. Information interfaces and presentation (e.g., HCI): User Interfaces.