All of these are perfect for kids of all ages! 
Light-Up Eruption- Create a foamy and colorful eruption that resembles toothpaste.  Everything needed for this comes in a reusable light-up Christmas cup.
Fizzy Trees- Make a colorful and festive frozen tree that erupts when a reaction occurs.
Snow Slime- This perfect experiment includes "snow" in the mix. The materials for this come in a tin Christmas tree.