Why not open an e-mail account for your child?
When your daughter or son is born, start to write them e-mails containing your thoughts, dreams, desires for them as well as writing about any special memories. Those special moments fly by so quickly and it will be a valuable gift to give them when they are older; perhaps you can give them the password for their account to read their emails on their 18th birthday.
This can be an especially great way for a father to express themselves to their child. All it takes is 3 or 4 minutes to write a short email from your phone. This is also an enormous gift for yourself as you will value your child through your writing. One day when they are given access to those saved letters, you can also re-live the beautiful moments that might have been forgotten.
Be blessed, your Christian Pälchen