If you can, send a puzzle. Children should like stereoscopic stickers. If the child's understanding ability is great, buy him an early education machine. Some early education products are helpful to children's growth. Some early childhood education machines contain many animated short stories. The morning education machine I bought for my children is in the night garden. Nowadays, children listen to the morning education machine every night. Those machines also have MP3 function, which allows children to listen to some before going to bed. But now children can play with it every day, at least I think it's worth it.