I like to give a new toy every Sunday to my twins. There is a box in which I collect toys and
games for them; some chosen from Amazon, some bought from the Dollar Tree or
from Target, some that friends gifted, and some for ages 4+ that I bought from
Bangkok when they were not even 1 year old.
Whether it's a puzzle, a soft toy, or anything that kids haven't seen or
played with before -- I (usually, if I remember and don't get too busy!) give
it to them on Sundays.