Deseret online has FHE ideas by topic, they even have a treat recipe with each lesson. LDSSplash has FHE tips and games, and be sure to check out Familiesinzion for some additional ideas for lessons. It makes planning FHE's easier if you have a theme. This may follow the yearly Primary or Youth. You may also do the Articles of Faith, or Scripture Mastery.
If you are looking for some origional activities, you could make your own word searches, cryptograms, and crosswords. You could insert your own names and make them relevant to the specific lesson your trying to teach. You can also create your own bingo cards, you could include your children's names and anything that may pertain to your lesson.
LDS.about.com has some fantastic printable games like: Nephi's Boat, Book of Mormon Scripture Cards, Red Sea Troubles (file folder game), Book of Mormon Scavenger Hunt, Ten Plagues. They also have some printable assignment flower pot charts or wheels. They also have a really good FHE treat recipe book.
JennySmith.net also has some really fun games to go with any age FHE.
There are also some fabulous coloring pages from the Friend. This link will ease the burden of having to search each issue for those pages. Here's a great Pioneer Coloring Book. It was derived from several journals of real pioneer girls. Jennysmith.net also has a section of coloring pages that range from primary lessons to holidays.
- Keeping minutes of your FHE's can be a really fun way to record family memories.
- Here's a great link for making assignment boards and costumes to really do up your FHE!