

子どもには好きなことをさせるつもりです。
夏休みに、息子に一人で旅行をさせました。
その仕事、私にさせてください。
"させる" is in the lesson "Verbs 22" (Level 45), along with 11 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.