How can I help my 4yo pick up spellings quickly? Are there any games she can learn from?

for my case, i gave my 4yo son 2 to 3 words to learn everyday. make sure he knows how to spell it. make him keep repeat it. like daily life he use some english words to talk to us, we will then ask him so how to spell that particular word. another way is from singing and when he learn to do the enrichment books. i make sure he learn to spell and read the words out. personally i feel that making my son keep repeating helps him.