Giant GrassHoppers

These are two Grasshoppers I Captured from my back yard. The Female is really large. I had her in a jar for a few days before adding the Male. I feed them grass which I spray with water to keep fresh longer.

I'm pretty sure there are going to be little Grasshoppers, but don't know how long it takes!
Do you think I should Let Them Go, or, Keep Them?