I bought some 5 inch candles at Ikea and the kids are going to draw a picture or colour on white tissue paper (put a piece of regular paper underneath so it doesn't rip and ask them to colour gently) with sharpies. Then cut the tissue paper to fit around the candle, wrap wax paper around tissue paper and candle (wax side against tissue paper) and blow dry on high heat until the tissue paper adheres to the candle. I added the date and the child's name to the tissue paper. Turned out awesome.

For better instructions turn to Pinterst.