These two were either mislabeled or not labeled at all when I got them. Please ID if you can. The first one that looks like a cactus has soft needles, while the second one has variations of white/green/purple throughout. Both stand about 5" tall.
First looks like a Euphorbia. (Not a cactus.) 3 may be Crassula ovata cv. Lemon & Lime/Tricolor Jade.