For our family, for almost all verses we need a prompt of the beginning line. Plus once they learned to read I show it and we simply read them aloud together. For many verses, esp. prior to reading skills came in,, we made up motions and used the bit of sign language we knew to help it stick, or a song. However, we did not begin memory work until about age 6. My boys are now 10 and 12 and have a good many verses truly hidden in their hearts thru SCMs gentle method.
I’d say if you do any at all, do motions and songs, keep it light and fun, they are quite young yet.
We read a lot, and really enjoyed Leading Little Ones to God, and are still enjoying Vos’ Story Bible.
Hope that helps:)