I think now would be a good time to talk about the first thing people see when they walk up to your house, the front door and porch.

• Go to the craft store and buy a wooden plaque. Paint it whatever color you like ( bright colors look like birthdays). Drill holes in it. Hang it with curling ribbon in colors to match. Use a Paint pen in a bright color to write Happy Birthday. Its cheap and hand made, how can it be better...
• For another idea try buying a grapevine wreath an add lots of party favors or small boxes wrapped like gifts. Add lots of bright colored ribbons and even small birthday signs if you can find them.. If you buy a wreath you can change it for most holidays if you don't glue the items down but wire them instead.. Its like multi-tasking..
• On the porch you could stack several large boxes wrapped to match your decor. Add a few on the table or even in flower pots. Take a urn and place a box just big enough to lay flat on top, then start staking them in smaller versions untill it looks nice visually. don't forget to tie a pretty bow on top..

These ideas should help to make the front of your house say Happy Birthday! Hopefully my ideas help you come up with some of your own.. Then your house will really say Happy Birthday from you..