Yes!
One mother recently wrote this following a short Reiki treatment I gave to her baby:-
“Carmen gave Reiki to our 6 day old daughter and the effects were amazing. Our little girl, Autumn, was fussing for milk but the minute Carmen started giving her Reiki she entered a state of complete calmness. The faces she then pulled were rather entertaining from smiles to absolute focus. After the session she slept serenely until time for her next feed. I was so shocked at the immediate and obvious calming effect of the Reiki.” – Sarah, Woking