When Computers Get Old

My children's computer is my old computer, the poor old thing is really struggling to keep up. The games and activities they want to play are not compatible with it, it does not have nearly enough system memory and it keeps freezing in strange places. It won't load the girls Princess game and it won't play the toddler games. In general, it's days are up I believe. But now the question is, where do old, out date computers go. It feels wrong just throwing it out with the trash?