A small or medium coffie jar for ten of them at the size they are now, you could use anything that gives them enough space to hop around, and have some where to hide or retreat too if neccessary im not using lamps on them when they are this size as it causes the tanks to dry out to quickly and results in casualties, i dust the food with calci dust to ensure they grow nice a strong, other than this, they are pretty basic frog to keep, if your on a frog forum and own a species of frog, you can probably care for these with no problems, they were my first amphibian and second pet, they are easy to keep and fantastic to watch !