Hi Cee,
What a lovely gift. There are different varieties of Scilla, but their care is basically the same. They aren't cactus at all, but bulbous perennials. Take a look here at some different ones that might be what you have.
http://www.desert-tropicals.com/Plan...auciflora.html
http://www.desert-tropicals.com/Plan...lla_lutea.html
http://www.desert-tropicals.com/Plan..._maritima.html
If I have it wrong, let me know.
Newt
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.