To make the Santa, I paint the heel of Claire's foot cream colour and the rest of her foot red. Then I painted Simon's foot brown and stamped it next to Claire's footprint. Note: When you're doing this try to make sure you line up the toes of the footprints, otherwise you'll end up making stairs for Santa and the reindeer to walk up :) After I stamp their feet on the paper I have a face cloth right next to me to wipe the paint off of their feet. I always use Crayola paints and it wipes right off. We usually head up for a bath shortly after these projects so that I don't have to worry about getting all of the paint out in between their toes.
Once the paint was dry I started to create the reindeer. I used a brown Crayola marker to draw antlers, ears, arms, and a tail. I used a red marker to draw boots and a smile and a blue one to dry a hat. I added some googly eyes and a sequin for the nose, it is supposed to be Rudolph after all. Then I cut up some patterned paper so that Rudolph could carry some presents. Now while I think that the reindeer looks wonderful, Claire (she's 5) feels like he's not authentic. "Mommy, Rudolph doesn't wear boots or a hat and he DOESN'T carry presents. That's Santa's job." So maybe consult your little ones as to whether Rudolph wears boots and a hat :)
For Santa, I used a black marker to drawn Santa's boots, belt and nose. I used a red marker to draw Santa's hat, smile and arm. I drew his mitten and toy bag with green markers. I glued a sequin on Santa's belt and added some googly eyes. Then I ripped apart a cotton ball to make Santa's beard, the fur on the top of the hat and the ball on the end of the hat.