Yes, I do this quite often for my toddler daughter. Get a plastic bowl (tuperware or whatever), spray with Pam. Add the egg, scramble, add just a touch of milk, scramble and microwave for 1 minute. Wa la, perfect! If you make two eggs, it is slightly longer in the microwave.
If you add too much milk, it will be runny. Just a touch of milk...
Good luck. Let me know who it turns out.