As I was browsing for ideas for our Book of Mormon theme Primary activity, somewhere I saw the idea of Lemonites (Lamanites). The first image can be used for the invite. Here are some ideas we have so far for our activity:
Print large Lemonites on cardstock. Tape to the gym floor (with painters' tape, of course) and cover with a clear plastic tablecloth. Use beanbags to "defeat the Lemonites (if you land the beanbag on the lemon).
We are making Nephi's bow and arrows using q-tips and small elastics. We will tape Lemonites on the wall and the children can try to shoot at them. The tutorial can be found here:
We are going to have some sort of sword fighting activity as well using pool noodles as swords.
Of course you'll have to serve lemonade and other lemon related treats.