Looky what I sees!
It looks like my Christmas cactus (Schlumbergera Truncata or Schlumbergera buckleyi?) has started producing buds. In all I have about 10 or so in fair size. It also looks like more may be still to grow, you can see that a few more of the growth tips are slightly swollen.
BTW… I’m fairly sure that the cactus is just a succulent. I don’t think these plants have the areoles needed to be correctly tagged as a cactus.
And yes, I know the labelling of succulents/cacti is a bit of a minefield!