

公園の池にかめがいます。
弟は家でかめを飼っています。
かめは歩くのが遅いですね。
"かめ(亀)" is in the lesson "Fishes" (Level 14), along with 10 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.