Urgent! Feeder mice

I was at the store picking up a black and tan female mouse and I was given two hoppers for 50¢. Aparently somebody had ordered in some feeders and never came to get them, and the store girl didn't want them to die. She didn't have much info about them being just the cashier. Boy (Turbo) is about an inch and a half long and walks like a normal mouse. Girl (Paige) is about an inch and walks like a baby. I have some kitten formula and a tiny dropper. I think they were drinking out of a tiny drip bottle already. Can they eat solid food yet? When can they? Other advice?

Yes, the mouse count is at 8 now.

Mice wean and start eating solids at three weeks. They're capable of breeding at 4-5 weeks. :)

Good luck and congrats! I adore mice! :D