The Internet allows for access to more research, knowledge and resources; this is immensely important for young, developing minds.
Internet access can help kids in abusive situations realize that their home life is not normal.
The Internet offers access to different viewpoints from those of their families. Young kids who would otherwise have grown up sheltered and with regressive and harmful views can learn to question their parents through Internet resources.
Internet research may be the only way that young people can find out about topics which affect them, e.g. a child who feels they may be LGBT+ can find information about (and support for issues with) sexuality and gender online that their parents or schools may be unwilling to give them.
Most teachers now set homework assignments which require some level of internet access or use of computer software.