I would get them a book explaining their christening or a kids book We really appreciated recently when our little one was baptised books for her age and age appropriate toys too Family bought their first Bible/certificate holder etc
My first bible Silver spoons Certificate holder (they’ll get a baptism/christening certificate) Money box Silver bangles Crucifix
I got a puzzle which is there name
Birth certificate holders Cutlery Memory box with name A photo frame with the date of the christening First money box and put some money in Hope this helps xx