A Trio of Succulents

A new addition to the family today was this trio, triad or troika of succulents, or cacti, or both! I think they are probably succulents, though I am not really sure. They were bought individually and placed in a bowl discovered in the kitchen, and filled with pea gravel found in the garage. Looking after them will require some research and new learning. The small garden centre where I bought them were helpful to a degree, but perhaps didn't realise what a total novice I am when it comes to the care of succulents/cacti.