Art works from day care

The boys went to day care during the first two weeks of the school holiday. Below are some of the art works they brought home at the end of each day. I have no idea what to do with them. Should I keep them until one day they are famous artists and sell them for a high price? 

I doubt that day will come as they took after their parents in the arts department. So I took pictures so as to show them when they grow up.

Pretty and neat art works won't you say. But what do I need them for? To decorate their rooms? I have others from school.

I wonder if my mother would like to have them. If not, they are heading to the bin soon.......