I just finished doing two weeks of camp with phonics, and an additional week of phonics classes. Have you taught them phonics before? It was the first time with my students, so it was a little slow going.
I used some alphabet cards to elicit the sounds and had everyone practice until most students could pronounce it correctly. I explained the difference between voiced and unvoiced sounds and paired most letters accordingly (t and d, p and b, f and v...). For the vowels, I just taught the long and short vowel sounds to avoid too much confusion.
I taught the younger kids a simple phonics chant, which was a little hard for them even though I slowed it down from the original speed. I used a ppt with pictures to elicit the target words. (The chant goes "A says a, a, apple! B says b, b, bear.")
I also used my teacher's small whiteboards for a writing race. For the lower students, I just said one sound so each group had to write the correct letter and hold the whiteboard up. For the classes that had a good grasp of the individual sounds, I told them three-letter words they definitely didn't know, so they could sound it out. (Be sure to use sounds with obvious spelling, like hag. When I said jot, a lot of kids wrote got and it seemed unfair to tell them no for that one.) I gave 3 points to the fastest group, 2 to the second, and 1 to the last. The kids really enjoy this, even when it's difficult.
You can also play the pyramid game. It looks like this:
liver river liver
dad tad dad tad
1 2 3 4
and usually continues until you have 10 lines. It's best to use minimal pairs, unless your students are really low level. Again, you can do this with single letters. Put some arrows between the words to clarify. You should tell the students one word from each level, and they should trace the arrows until they get to a number. If they did everything right, they will find the right number. You can also get volunteers to read for their classmates. It's really rewarding for them if a lot of other students understood them well enough to get to the right answer. Remember to use only two choices per line, or they can get the right number simply by choosing the correct last answer.
I also made a worksheet with clipart that looks something like this:
A (ant) (foot) (egg) (apple) (cat)
They have to say each word and circle the ones that have the 'a' sound. If your students can, you can include sounds in the middle of the word, like cat.
Sorry, I left my USB stick at home today so I can't post my files yet. I'll attach them when I get home tonight.