Here are the apideas that I bought last year. They are Swienty brand - and there are many others. Reading the reviews, I think perhaps Swienty are not the best.
This first photo shows the mini-frame with the foundation strip, held in place by molten wax applied to the edges.
The second photo shows the feed chamber, loaded with Apifonda (bee candy) with a piece of balsa wood on top for bees to stand on rather than fall in and get stuck. Note the queen excluder on the upper right - to stop the Queen getting stuck in the apifonda.
Third photo is of the painted nucs. Each a different colour. Should be a green one, rather than two shades of blue, but I didn't have that paint in the shed. Note the entrance on the middle nuc is open.
Final photo is of the nucs in position. I stocked each one with 300gm of bees (well, OK, a scoopful) and a queen cell from friend Emma's gentle bees. She had eight QCs to deal with. So one of these queens (if successful) will go back to her.