I have a small nuc started from a couple of frames, one with a swarm cell. It has done well and has a laying queen. I've promised this nuc to a friend. The population is quite small though and I'd like to add more bees so it will be a nice full nuc. I have several booming hives to get bees. Any suggestions for a safe (for the new queen) way to add bees? Easy would be great. Thanks in advance!