What a cute idea!
You could do a "cake walk" except with a candy prize. Just put colored laminated paper (You could do cute candy shapes) on the ground in a circle. One or two should be special ones (extra big, special design, etc). You play music (fun candy themed music would be cute!) and he the kids go around the circle stepping on the candy shapes. When the music stops, whoever is on the special shapes wins a fun prize.
You could also decorate cookies to look like lollipops. Ahead of time, make small sugar cookies, and insert a lollipop stick in the dough before baking. (You can get these at Michaels Arts and Crafts. Wilton makes them.) Then have colored frosting and candies for the kids to decorate them with. They are cute and tons of fun. And totally unhealthy, I know, I know! :)
You could also do a "How many are there?" contest. Put lots of bright colored candy, like jelly beans, in a large jar and have the kids guess how many candies are in the jar. The one who guesses the closest wins and gets to take the candy jar home.
If you don't want to do lifesavers for the candy necklaces, you can use fruit loops instead. Cheaper and not quite so sugary.
If I think of other ideas, I'll write again. Good luck and have fun!