Reading materials for enlightening babies
Parents can use some books to enlighten their babies and tell them when to go to bed.
Game building blocks
You can buy some game building blocks to let them play freely when you play. Of course, it will be better if parents join in.
Parents' size
Parents must have a good sense of proportion and don't let them leave a shadow on things like study.
Learn from happiness.
Let them learn in happiness and grow up in happiness. Only in this way can "early education" continue.