I got two of these teensy cactuses (cacti?š¤) terrariums yesterday. Theyāre about 1.5 inches tall at the top of the dome. They came with no information other than that they donāt need any care for three months, but Iām skeptical. Iām also clueless about cactuses because Iāve never had any before. Thereās a little bit of grit at the bottom and some air holes, and I think you can unscrew the dome. Iād love to get some advice from folks who know about these prickly little guys! Thanks ahead of time! š