Every German learner meets the same obstacle, and it arrives early: a noun is not just a noun, it is der, die or das, and the article is not guessable from the thing itself. Learners who meet nouns bare and attach the article afterwards spend years correcting themselves.
LingoSprout sidesteps that by never showing most nouns bare. 231 of the 266 picture cards carry the noun together with its article, so a child's first encounter with the word is already "die Katze". It costs the child nothing — they are learning a sound attached to a picture either way.
The cards that do not carry an article are the ones where it would be wrong to: colours, numbers, parts of a set, and words that are not nouns at all.
