This is a great site I found today. http://www.123certificates.com/
You can make free customized printable certificates! I don't know if you do a lot of recognition for your kids, but I really think there is a lot of value in it and I should do it more! Be genuine and don't ignore things that need improvement, but if your kids are doing something well, let them know!
No matter who you are or what you do, getting recognition for your work can put a little bounce in your stride or a smile on your face. It is nice to know others appreciate what you have done! Forge ahead and tell your kids what they are doing well. If you think it is a little bit corny, try it and see what happens! Be positive and give your kids a friendly note that will fill them up and make them proud of what they do every day!