Plant ID needed, please and tank you

[AbranV]

I've looked through all the books and websites i could find, but no info on the first one.

Oh well, they were only a couple bucks apiece. I'm using them as practice plants to hone in my planting skills.

[Tzunu un]

I agree with #2 (Chlorophytum comosum) and #3 (Cryptanthus).

Plant #1 is a variety of Euphorbia milii

"The sap is moderately poisonous, and causes irritation on contact with skin or eyes. If ingested, it causes severe stomach pain, irritation of the throat and mouth, and vomiting" - similar to most Euphorbias
Euphorbia milii - Wikipedia, the free encyclopedia

I wouldn't put it in a vivarium.