DIY Mod Podge - fill jar half way up with white glue, then fill jar up with water. This is a mixture glue/water. It will have a Matte finish. If you would like a Glossy finish, add 1 TBS of clear varnish.
Did this for Mom for mothers day. I got wooden letters and painted them, then took photos and got them framed. I plan on doing it every few years as the kids grow up. Hint only buy one M. Or one D if your doing it for Dad. Wooden letters can be found